Mtn bad service

<p>I up grated 2 month ago to a sum sung 7 I had my phone 3 weeks and then my phone froze gave my phone back to mtn waited five weeks got my phone back yesterday and still with the same problem after I had to pay r1102.00 for one part I just think that this is not right I had to phone after my phone and then they still lay to a person I think the service is one big disaster and I am paying for a device that I don't even have</p>