Dissatisfied customer

I have a personal loan with Capitec which I have been paying monthly from my Capitec savings account. I have since switched banks and all debit orders. When I first contacted Capitec to let them know about the changes, I was told they are unbale to debit the bank I have switched to. I arranged for a stop order to make payments towards the loan but apparently it does not go towards the loan installments but reflect as ad hoc towards the balance. Since I had planned to cancel the Capitec savings account, I feel like I'm forced to stay with with for the sake of the loan because they are unable to debit my new account and I was told by an agent Rethabile that I would literally have to call in every month to make sure the payment is going towards the loan installment. How is this any of my fault that their system is no up to par???? I need this resolved ASAP because I made initiative to inform you that I'm switching banks and its not my fault that you cannot debit that bank. The agent even had incorrect information on her end while I was speaking to her like my debit order amount and pay date. What does this say about Capitec???