MTN POTHCEFSTROOM and MTN SUCKS!

I am very annoyed with Mtn Potchefstroom Mooirivier Mall and MTN customer service OVERALL. I have cancelled my contract with Mtn by Email. I got conformation of this. On the 2nd of February I went into the Mtn in the Mooiriver Mall to check if my cancellation was captured. The lady that helped me was Humairaa. She asked me why I want to cancel my contract. I explained the reasons to her. One of the reason was that the signal in Potchefstroom has been bad for the last 3 months in my area. I had mtn call me and also send me a mail confirming that one person of the coverage team will visit me in the next 96 WORKING hours. That was 3 weeks ago. The other reason for cancelling my contact is that, Mtn has been promising me an IPhone 6 since Des 2014. They did not deliver. In the meantime I seen on South African TV that there is a problem with networks in SA, and it is a problem all round. All though friends that has Vodacom as service provider don't seem to complain that much. After speaking to Humairaa at the MTN Potch Mooirivier Mall. She promise to have a Iphone 6 for me in a weeks time. Se even mentioned that she just got a Iphone 6 for a client the previous week. It is now almost 3