Disgusting service

I made a payment on my account on the 28th May 2018 of R1300. Up until now it has not been credited to my account. I contacted the call centre on the 2nd June 2018 when i received a msg to tell me i havent paid. I then sent an email on the 5th June 2018 to ********** and i received a response on the same day saying it was forwarded to the relevant department which was ********** I had no response from them even after i asked for feedback. I then received another msg stating im at risk and i need to pay immediately. I once again called the call centre on the 7th June 2018 and the agent was kind enough to hand over the issue to the line manager Reza in order for this to be resolved. I then received an email from ********** requesting information that was provided on the first email i had sent. THIS MATTER IS STILL NOT RESOLVED AND ITS ALREADY 2 WEEKS LATER SINCE I PAID. I want this resolved immediately and i want to know what will be done with regards to my credit record as this will be affected due to systems and staff that dont work.