Terrible Customer Service from MTN

A month ago I sent my 3 week old iPhone in for repairs to the MTN branch.The guy there was very helpful, however, its been a month now and I still don't have a phone.Within 5 days of the phone being booked in at the repair center, they send the phone back the branch, still broken, because I had to log out of my iCloud account.I did it within 30 min after receiving a call, and informed them immediately.So after sending the phone back to the repair center, once again, a week later I get call to say that the phone will cost RX to replace.I said it was fine and that they must please go ahead.Two weeks later and I still haven't received an invoice to pay for the replacement phone.And this is after phoning everyday, hanging on the phone for at least 30 min at a time, just for them to tell you once again, that are working on it. Working on WHAT? Just send me the damb invoice so I get the new phone. Yesterday the guy from the call center phones me to say that they have now told him that they are repairing the phone. Now I ask you, what are they doing there. Two weeks ago they tell me that I must pay in for a new phone, now they are repairing it. I tried phoning head office- NOTHING!!