FNB Loan

I have a had a loan with FNB for 5 years this month was supposed to be the last installment. FNB has always done a debit order for 5 years and because this is the last one I'm having they didn't. I chatted to Tshepang who kept telling me to pay directly into the loan to avoid further arrears. I doubt he was even looking at my account. I could do it but will not since it is still within the month of April they should do a debit order not they want me to transfer the money so they can say that I didn't transfer everything and I'm owing them. why is this suddenly happening when it is the last installment. The normal debit order is R3174.38 which should have closed of my debt but the loan amount on the app is R3552,00. The consultant just upset me really.