Product: Debt collection

XXXX was ordered to close my account effective XXXX 2015 as the property that the account was associated with was being vacated at that time. On XXXX 2015, I was contacted by XXXX and they said that the account was past due and to bring the account to XXXX, I must pay the total amount due of approximately {$420.00} immediately. I paid the amount in full over the phone using my bank account. I had no idea it was that past due and wanted to resolve the issue immediately. I confirmed with both a XXXX Representative and a XXXX tech who picked up the TV boxes that all accounts were resolved and all equipment had been returned. The account was turned off and all was done. Six months later, I was notified by several daily phones calls that my account with XXXX had been sent to a collection agency attempting to collect a past due amount of {$190.00} which was applicable to the XXXX activity. I called them several times to explain that not only had the account been paid in full in XXXX that prior year but there was no active service in my name during XXXX 2015 as the account was shut off effective two months prior. Additionally, the monthly service amount did n't even equal {$190.00} as I only had two TV 's on basic cable so the amount did n't make sense either. I have made endless attempts to contact both the collection agency and XXXX requesting back up for these charges. I refuse to pay this amount as I am worried that no matter what amounts is paid, they will come back at a later date telling me I still owe more money. This account is and has been a nightmare. During service they constantly were charging me amounts that did not reflect the contracted/advertised amounts and now, after paying the account in full and returning all equipment, I still continue to accrue services charges. I have requested from XXXX, IN WRITING, full support of these charges. They will not provide this to me and refuse to resolve this issue. They simply state that I owe the money and need to pay it immediately. They also continue to tell me that I also have to resolve the issue with the collection agency who has damaged my credit score by over XXXX points. A credit score I have protected and maintained at a high level my entire life. This companies accounting systems have failed and I do n't believe I should have to continue to pay amounts that they arbitrarily assign to my account which should have been shut down and was confirmed as shut down over 6 months ago. I fear this company will continue this fraudulent attempt to collect a debt that simply is erroneous. I have paid them in full and I am seeking some assistance from the government to help me stop them from not only further damaging my credit score but to stop trying to collect an amount that is not mine. Any assistance you can give me, including a request for them to give detailed accountability on my account activity proving that this charge was incurred prior to the shut off of this account effective XXXX, 2015. If it was incurred, after that date, it is simply not owed by me. It is their accounting error that they must resolve in house. They will not respond to my request to provide the support for the charges.