Capitec Bank - The worst service ever. Seriously Bad

I had app**** for a Credit Card at the Birch Acres Mall and advised Capitec Bank to debit on the 25th of every month. My bank account was debited correctly the first 2 months but change on the 3rd month to the 24th. This affected my credit profile and incurred bank charges on my account. I then received a number of calls from Capitec, harassing me for payment on a mistake that they had made. I agreed to pay double on the 25 May 2019 so that my credit score can be up to date but then then did the same thing again and debited on the 24th May 2019, which bounced back as i get paid on the requested date of the 25th. I then called the credit card department on the 27th May 2019 to find out reason for the incorrect debit date, where i spoke to a lady by the name of Barbara Mo***eng. My questions weren't answered so i request to speak to a manager and was promised a call back on the same day before COB which i didn't get. I called again on the 28th in the morning where a very rude lady hung up the phone on me before even taking my details. This awful service has now ruined my credit score, and overdrawn my account and i would like a formal apology and need this fixed.