Loan account settlement

Good Day,

I paid up a personal loan with you in January. In February you still took the payment i then made numerous calls to the call center, the loans department eventually refunded my money only to have a debit deducted from my account again this month. Today after R400 in airtime and 3 trips to the bank i was told that they refunded me too much and therefore debited my account. This was not noted by me as the settlement amount normally differs from the amount on the online banking based on the interest and service fees. If i check my loan account transaction history i see credit insurance and account charges added after the account was settled and the credit adjustments done.

Could someone please assist me as i cant be held liable for a debit i was unaware of.

I am about to move accounts but im sure that means nothing to you.