Capitec bank

I went to capitec bank campus Square on the 20th March to settle my capitec loan, which the lady advice that it was done and provided with the settlement letter however the later that day I received an sms saying my debit account has been changed successfully. I've sent countless emails to capitec requiring this to be fixed but no feedback from them. On my capitec account shows I'm still owing R4000.00 and the loan is still active