Incorrect Vehicle Finance Statement (This is **********)

I received my account statement for June 2018 and it states that I am overdue, however, last month the full amount was debited as per last months statement.

I was debited for the following:

Installment Service Fee VAT

Usually the Installment, Service fee and VAT all go off at once but in June they were separate debit orders for what ever reason. Absa now states that I never paid a portion of the balance and now owe the balance with interest. This is definitely not the case as my full amount was debited.

Why am I being held liable for an overdue amount when the amounts go off via debit order? Absa has made an error and I am now being held liable. This is ***** and I would like it rectified immediately before my next debit order.