Inconsistent debit

Since month of February 2022 differs and has been increasing. I spoke to someone in accounts department telling them I have one vehicle with them the othe car was sold but I’m paying for two. She said she will rectify the error and credit my account, yesterday they debited a larger amount. Meaning I will have to cal in, where calls take forever to get answered and be **** to again. I’m gonna reverse the debit with my bank