Product: Vehicle loan or lease

My car got repossessed with American Credit Acceptance on XX/XX/XXXX. As a result I had to set up a reinstatement payback plan to get caught up on payments and get my car back. The payment plan was set to be paid back by XX/XX/year>. On that particular date I made my final payment, and contacted the auction house that held my vehicle about their fees. About XXXX week later on XX/XX/year>, I decided to go on my account and saw that it said I owed {$1700.00}. I knew that the amount was incorrect so I immediately called American Credit Acceptance and found out that XXXX of my payments from XX/XX/year> was on chargeback status. I was advised by a company representative to call the bank while still on the phone with her to confirm the cancellation of any type of dispute/chargeback that XXXX have been in progress without my acknowledgment. I was then alerted by the bank that everything will be okay because they did not even start investigating any claim, therefore did not remove funds from American Credit Acceptance. After hearing that, I promptly asked American Credit Acceptance why my account showed that if my bank stated no money was ever taken from them. American Credit Acceptance stated that they no longer had that particular payment amount in the custody. I was advised to call back the following Monday on XX/XX/year> as the funds should reappear. I called back on that date and noticed nothing had changed. Now the company, American Credit Acceptance is asking me to pay the {$1000.00} all over again without even trying to see where the funds had gone. After refusing to do such a thing, I called me bank and was informed that the company should have received their money back because they sent ALL funds back to them on XX/XX/year>. American Credit Acceptance basically said that my bank was lying and that it was impossible for me to have canceled any dispute because they still dont have any thing. So I spoke to about XXXX managers who all provided no assistance. Finally on XX/XX/year> I spoke with a manager who said that if I provide proof of payment being redebited from my account then they would investigate where the funding was. I sent in a running bank statement, which was not accepted because they wanted a statement that included the date the amount was retook from me, which was impossible until the XXXX of XXXX due to when the bank makes them accessible for me to download. So I sent a screenshot of my bank showing the date and amount being recharged to amount. That was also no accepted because they dont take screenshots. I had to physically go into a bank and have the manager print out a statement sheet along with an XXXX document that showed the same information. At first the manager accepted the documents but after waiting the XXXX hrs, I called only to find out those documents also were not accepted because they felt as though they were tampered with. I then sent in an enclosure that stated the amount getting recharged to me as a result of a chargeback cancellation. They also did not accept this because they claimed that although the amount is shown in the paperwork, it does not show that the funding is being sent back to them once it gets retaken out. I called my banks claims department and was once again told that American Credit Acceptance must have misplaced the funding. My bank also gave me a payment trace number. I provided that to American Credit Acceptance and was told that they could not look up the payment without the running bank statement showing the funds being retaken out of my account. And now I am being forced to repay {$1000.00} in order to get my vehicle. Every conversation between me and American Credit Acceptance has been recorded and documented to show how the company is handling my account.