Quick to ask me to cancel with them but refunds are only promises

I was due for upgrade and went from Cell C to MTN hoping for better networks. After 2 weeks of poor signal, sim swaps, technicians MTN ask me to cancel my contract with them due to tower is my area not working causing no receptions at home office - according MTN fixing the tower is not planned soon and it would be cheaper to refund me in full to go to another network. Needless to say I had to hand in the phone 1st before they can process the refund - phone was handed in 3 June at Tygervalley branch + refund/cancellation form. Still number could not be ported because phone has to arrived in JHB 1st which took 10 days because MTN courier delivered at wrong office/store. Well its 24 Sept and with many many calls, refund numbers, sms & emails to Suzette manager of Tygervalley branch I'm still waiting on my refund of R1130.63. (only the screen protector & Groundwire app I had to buy to be able to make calls was refunded = R298) I've sign up for a R799 contract bur got billed R1130.63 PLEASE CAN MTN CEO SEE TO IT THAT I GET REFUNDED FOR MY R1130.63 AS PROMISED - BEFORE CHRISTMAS IF THAT IS NOT TO MUCH TO ASK. FEF NO: Req ********** / ********** 02 / **********