Product: Debt collection

I have received the first phone call on XX/XX/XXXX, no voicemail was left, but when I tried to answer no one spoke and the call was ended, by the party calling. 
on XX/XX/XXXX, I received another call with the exact same thing. I answered no one was there and the call was ended, again by the other party. I called back and a total of 3 times the first two calls I literally could not understand the company they were with as they intentionally rattled it off so fast I could not understand them. No this was not a mistake as it happened 3 out of the 4 times I called. The first person I spoke with said they were trying to reach XXXX XXXX ; I asked if this was an attempt to collect a debt was written notification sent to them. The lady said yes, it was and asked if this was XXXX XXXX. I said I do not verify information, and not to call back. They did not acknowledge I said not to call back they said if they cant verify who they were speaking to they were ending the call. I called back immanently, again could not understand what was being said when they answered the phone. I told them I am XXXX XXXX, they my address, I said I do not verify information, I have not received written notice of an attempt to collect a debt which is a violation of FDCPA of 1977, They were to inform the original creditor, and not to contact me again. I ended the call, but realized I forgot to have them Clearly state the name of the company, as well at get their address, fax, and any other pertinent information. I called the 3rd time, again could not understand what company they were with. The person asked me if I was calling in about my account. I informed them I do not have an account with them, I just wanted basic information. I informed them I was going to turn them in to the CFPB. I was put on hold for about a minute. Then they finally came back on the line and gave me the address. I had to ask for the 3rd time at this point the name of the company. 
During any of these calls no disclosures were given ; I was not told this was an attempt to collect a debt, collection efforts would continue, etc. 
I called a 4th time to collect information for this complaint. I spoke to XXXX XXXX, He said he would not give me any information about this until I verified who I was, but proceed to tell me I was incorrect out violating the FDCPA, because a letter was sent XX/XX/XXXX. So, not only did they violate it be failing to send me written communication and allow for me to receive it, and he disclosed to me a letter was sent without verifying who I was. Additionally, he told me he couldnt hear me then said I was yelling at him. He also kept talking over me and when I asked him to spell his name, he refused. Because of both of those things I asked to speak to his supervisor. I explained what he had done and she literally said what do you want me to do about it. 
Furthermore, I should not have an account with any collection agency as XXXX XXXX owes me {$140.00} and I have attorney representation, additionally if I have any balance with XXXX then the amount they owe me should be used for any outstanding balance. 
If this is for XXXX XXXX ; I had just a COVID test ( and a COVID test only ) on XX/XX/XXXX, to which they were attempting to charge me {$250.00} for an out patient procedure, that I spend a majority of it in my car. My other attorney sent them correspondence stating that a COVID test does not cost {$250.00}, and I should not be charged for an outpatient procedure as I clearly stated I was not seeing medical assistance just the test and I was in their facility to just check in, and then receive my results. 
But I was not notified until one year and one day after the test, to which my insurance had changed, so nothing else could be processed. I am not paying them because they waited a year to send me a bill, which is there mistake.