Did not receive R100 data after purchase and no assistance offered

I am on a 24 months with contract with MTN and I opted for it because they had the phone I wanted to purchase so that's great. I only have one issue that is still not resolved. I bought data for R100 and received an sms that money was debited and that the transaction was successful and the data has been loaded. I never received my data. I called MTN and the person who helped me was not pleasant. She asked me to send proof of the SMS which I did and regardless of the fact that I stressed the importance of me getting that data urgently as I was working from home I was told to wait for 72 hours, well It's been more than three weeks and I still haven't received that data or my money. Can MTN please refund me as I am not allowed to speak to the manager according to the lady who spoke to me. Her name is Busisa Kuse.