Bad customer service

I am currently under debt review and my car installment is debited monthly and allocated to wesbank. I have reviewed my may statement from wesbank and noticed that no payment was made into wesbanks account. I therefore contacted my service provider and they sent me proof of payment and wesbank consultant advise me to send it to their customer service to unable them to allocated it unto my account. None was happened, evertime i call they take me to pillar to post and i am wondering all of this months since debits was going through to my account that was allocated accordingly.

Today is the 21/07 none has been resolved to date. All i get is that they will respond with 3 to 5 working day. This is really unacceptable and very annoying as i sent mail followed by calling but no one seems to care to assist me. This is ridiculous. Wesbank service is by far the worsed.