Very ****ed off!!!!

I have an account with Mobicred, I then asked if I could please change banking details . I sent conformation of new banking details The agent I spoke to DID NOT tell me that I can't move mt debit orders over to a new bank.account The debi check order was cancelled. only after all this nonsense they told me I cant change banks. I asked them to please keep the debi check the same as the Capitec account is still active. weeks later I get the debi check from my bank saying the depit order will be R4157.00 and Not R451.00 the way its supposed to be. I have phoned, I have emailed and whatsapped and this nonsense is still not sorted out. I am really so damn ****ed off that I must battle like this. All they ever say is we will get back to you or the issue has been escalated