Bad customer service

I have paid their credit card (R10000)on Tuesday 15 Feb 2022 in the morning, to date the funds does not reflect in the account that I have paid, instead they send me a statement that I owe R637. I have contacted them couple of times to resolve this issue, but it seems it is a very difficult task to solve. Their agents at WFS are clueless about their system. Bad customer service. And you hear that they, cannot solve any issues on weekends,? So clients must sit with the problems during weekeds,and during the week they can't even solve an issue.useless