Hyundai Capital America Consumer Loan Complaint

Hyundai Capital America Consumer loan department,

Vehicle loan Managing the loan or lease California

I purchased a - through a - dealer and financed it through Hyundai Motor Finance ( HMF ). I set up autopay to HMF from my checking account. The loan was paid off in - of 2015. HMF debited my account more than was due for the final payment. Then HMF continued to debit my account each month after the loan was paid off ( and after I had received the pink slip from the California DMV ). I called HMF on - - to revoke autopay and to get my money back. Autopay should have been automatically stopped when the loan was paid. I repeatedly asked HMF why this did n't happen but no one would answer the question. HMF insisted that the only way to return the funds was via paper check after - business days. They did not revoke autopay and debited my account again in -. How is this legal? If you pay off a mortgage the bank does n't keep taking payments. Why is this different? I should be compensated for the loss of use of the funds illegally debited from my account.