Horrible Service from Muminah Ganief

I went online to change my flight details , went through the process and just at the payment screen it gave an error. I saw on my account that the payment went through so I phoned customer service and the manager with the name Muminah Ganief assisted me. She was able to confirm with a 5 min wait over the phone that the funds have went off and is reflecting on the bank details on their side. she then asked if I want to proceed with changing the details of our flight as this has not been changed or if I want to reverse these funds and try it online again. this is where it started.

She changed the details as requested but then after confirming the card details there was another R724.50 deducted. I called her and asked about this on Thursday the 11 of October so that this will be reversed. she then said that she must asked the bank if this is reflecting which is odd because she was able to do this in 5 min over the phone so I left it gave her 48 hours and tried to make contact.

since the she doged calls , she does not reply me on my email and still I have received no feedback regarding the additional funds deducted.

I honestly need someone to assist and tell me why management or why Muminah Ganief is not able to assist or give me feedback????