Product: Debt collection

When checking my mail on XX/XX/XXXX. There was a notice from the United States Postal Service stating that there was a notice from the Marshall office that I missed and required a signature. Yet while looking through my mail, I found that they just left it without the required signature. I opened the mail that had my name on it and honestly became upset. I called the number for the Marshalls and it was closed. It was an Income Execution, it showed that this what entered in XXXX. I have no idea what debt this is so I contact the number listed at the bottom of the page and find that there office is about to close at XXXX and it is about XXXX. I am transferred numerous times after verying my name and than told I was being transferred to a supervisor even though I never asked for one. Of course I get an answering service and leave a message to be contacted. 
I kept trying to think of who this company was and how is it that I being threatened for garnishment when I never went to court. I was never served any papers and this is the first time I heard about this debt. 
XX/XX/XXXX I contacted the Marshalls office and was told to call the debt collector and request the affidavit of service and that whomever this debt collector is should be able to validate the time and place this was served and whom it was served too. I was told that regardless i still had to come down to the Marshalls office by XX/XX/XXXX and make a payment regardless of me having any contact with the debt collector so that they can avoid garnishing my paycheck. I waited a few days and called Forster & Garbus again on XX/XX/XXXX and again I am transferred after stating my name numerous times. This time I leave a message and request to be contacted and to receive a copy of the Affidavit of service. At no time has any one called me back about this debt. 
On the Income Execution the judgement creditor is XXXX XXXX XXXX XXXX and XXXX XXXX XXXX. I'm not sure if this is the same company. It stated that th e orignal amount is XXXX and amount owed is XXXX entry date XX/XX/XXXX plus interest from XX/XX/XXXX and transcript filed XX/XX/XXXX in XXXX County. 
Since this debt, I have been employed at three different jobs. I now in XXXX receive documentation regarding this matter. I've also lived at the same address since XXXX. I have not even seen this on my credit report so how do I willingly own up to a debt that I have no recollection of. 
I called Forster and Garbus again briefly onXX/XX/XXXX and the usual I start getting transferred after verifying my name. I than get frustrated and hang up. I still have not been contacted by any one from Forster and Garbus pertaining this matter whether it be via phone or mail. 
Honestly for a few days past and I forgot about it until one of my siblings asked about it and stated that I should file a complaint and keep calling Forster and Garbus. I than called them again onXX/XX/XXXX. I was hesistant because it was XXXX XXXX but to my luck someone picked up. Of course, I was immediately placed on hold and than the usual verifying my name and transferred. By the time I got to the 4th representative, I explained to her that I'm just trying to figure out what this income execution is about and if she could help me I would appreciate it. She stated that I was possibly getting transferred due to the lack of information I'm providing. I stated to her that I was always only asked for my name and than transferred. I asked if she can give her name and she did. She explained to me that my request for affidavit of service has been mailed XX/XX/XXXX and it should have all the information I need. I than asked her what was on the form and she was hesistant and mumbling words under her breath. I asked her if it was on a court paper and she said yes but had a hard time finding what court it was with. This should've been right at the top of the notice, She stated that I signed the document and asked me if I didn't remember it or something. I explained to her that I just needed information from the document that she stated was mailed. She than started stating that she can only advise me to look at the notice when received. She really could not tell me who it was served to or anything so we hung up. 
On XX/XX/XXXX, I received a notice from Forster and Garbus with the Settlement Stipulation, it appears that the court information was filled in and not an official court document. My signature is not on the paper and I know for a fact I didn't fill this out. I write numbers a certain way and never make a 7 with a line through it. I did work with the Employer that is listed. I do not recall going to court for this matter and do not believe that this is valid considering it is now XXXX and not even on my credit. I have not been served properly and my request for affidavit of service was never fulfilled.