Really bad service and no one that gave the correct information. People not talking clearly over the phone

I always pay my Credit card via EFT and more than the amount stating on my banking app. For years I was paying it into the same card number and never had problem. Suddenly on the 23rd of October I received a messages that I'm in arrears with R12*****. So I called the customer care and they told me the last payment they received was on the 4th of September. When I said I did pay on the 30th of September R2200 they said I must go to the bank that I was making the EFT payment from so they can trace it. I said to the woman please just have a look on the card number that I always used to pay my payment. Then she said yes it shows their and they will transfer the amount. Never did Standard Bank gave me any notice that I must not use that card number to make a payment, all of these years since I received my new card in 2022 I had no problem with any instalment I have made, it always showed on my banking app that the monies was received. Then when Standard bank did transfer the money their was a charge of R170 for late payment, that is not acceptable because I did make a payment more that the monies of the instalment due. Then since I called them I still receives SMS messages that I'm in arrears. I have made another payment of R2200 on the 2nd of November bur when I called on the 3rd they guy told me that my account is now over R2700 in arrears. When I ask how they calculate that and that it's not the same amount that shows on my banking app, he told me that on his side it shows that I used my card to buy R4200 from Presidet Hyper and thats why I'm in arrears and it was going backwards and forwards him telling me I'm in arrears and I'm telling him that I'm not and that the R170 late payment fee have to be reversed and my account be corrected. Then he told me I must look on my statement for the minimum payment and that will show that they payment is over R2700. Again I said to him I don't receive any statements from Standard Bank via e-mail since their was ***** on my card and that I'm going on the amount that my banking app said I must pay and I never had a problem why now? Well I just gave up and said to him I will report this on Hellopeter and to Complains and to the Ombusman because it's unfair the way Standard Bank is treating me as a loyal customer. I want Standard Bank to go threw my account and see for them self that I never skipped or not pay my monthly installment as per what they said on my banking app. I also aspect from them to reverse the late payment fees and banking cost accumulate of their wrong doings. As per my banking app I'm not in arrears!!!!!!!!!!!!!!!!!!!!!! I also told the guy it seems like someone is planning to comment ***** on my card because the previous time it was also when I complain about the service that their suddenly was ***** on my Credit Card.