How long should I wait in order to get my credit...MTN

I decided to cancel my contract with MTN and followed the cancellation process accordingly, In the month of August 2017 i received my last statement showing that I have a credit of R109.05. I then called customer service (808) on the 20/08/2017 spoke to some guy not sure about his name,he then sent a request to escalation with regarding my credit that it should be transferred to my bank account and I ave him my bank details, he told me that the escalation department will get back to me on Monday which is the 21/08/2017 I have NOT heard anything from MTN ... I really dont know whats going with MTN honestly, In order for someone to get attention from MTN is Always complain on Hello Peter... Can someone sort out this issue I AM TIRED OF MTN PLEASE!!! Please communicate with me via email that you have.