Product: Debt collection

I filed a complaint against XXXX for billing issues with reference number XXXX. The complete explanation form with the FTC was very very small & could not possibly contain the explanation of my billing problem with XXXX. I was only able to list my complaints against XXXX billing & service up until the XX/XX/2016. I was not able to tell the FTC in the online Complaint Form about visiting the store three times at XXXX XXXX in my attempts to straighten out my bill, showing the representatives at the store my bank account online so they could see my payments were made each month extending back more than a year with an extra few dollars each month to make sure the odd pennies were covered. Also, that the only reason I stayed with XXXX was out of my gratitude for them supposedly saving my contacts from my phone, but as it turned out, they lied & did not ever send me my saved contacts. Saving your contacts automatically was a XXXX service that they discontinued, even though their tech support told me & the store Representatives that they had saved my contacts & that the contacts could still be obtained by calling tech support. After being a customer of XXXX for more than 3 years they finally admitted that they had sold their cell phone tower in XXXX XXXX & that is why XXXX cell phone reception is so low in XXXX XXXX & I could not get reliable cell phone reception even in my house in XXXX XXXX, even with the cell phone signal booster they supplied me for free at the XXXX store.The store Representatives agreed that I was paid in full & completely caught up as far as they could see, in XX/XX/XXXX, XX/XX/XXXX, & XX/XX/XXXX, but that they could not understand why I continued to receive extra charges on my bill. I threatened to quit XXXX because they could not get my bill straight for almost a year & did not remove the charges that they said they were going to remove. The store told me the same story about how they could not remove all the erroneous charges at once, & it would take a couple bills to correct the charges. I gave them one more chance in XX/XX/2016 to correct my bill, showing the store Representatives on my tablet, my online bank account with my XXXX XXXX records showing my payments to XXXX were all made & on time over the past 13 months. The store representatives, being familiar with my repeated issues with my bill, told me that they would escalate an investigation of the problems with my bill through XXXX corporate accounting & the investigation would review my bills for my entire service with XXXX, to find out what these extra charges were for & why they were still on my bill. I received a written notice from the XXXX investigation that said the extra {$230.00} " was on my bill '' with no explanation of what the money 's were for, where the charges came from, or how I could have that extra charge on my bill, when I was at the XXXX store three times within 6 months, to make sure that my bill was completely up-to-date. I received another bill in print where they wanted an extra {$230.00} for accrued charges. After receiving this bill I called into XXXX accounts billing & spoke with XXXX on XX/XX/2016, about my bill & he insisted I pay the extra money without explanation. I told XXXX that I was in the XXXX store & showed my online banking records to the store Representatives which went back more than 13 months showing that I paid my bill each month plus a few extra dollars & he did n't care. I told XXXX at that time that I was quitting XXXX, would payoff all my equipment, return the cell phone signal booster, & be done with them, & that I could change to XXXX cell phone service to avoid all these billing problems. I did not like that I was sacrificing the interest I paid in advance for the coming year for the equipment I pur-..