Bad Service

I opened my contract with MTN last year and this year around Feb my phone just goes off... Okay I decide to take my phone back to the store so I could be explained to what exactly is going on, I get to the store at Cresta Mall, they first give me a hassle over the cover of the phone, which I couldn't remember where I had placed it. What I couldn't understand was that I was not having problems with the cover but the PHONE. They decided to book it under repair and not guarantee... This was on the 20th of Feb(I stand to be corrected) and I was told I will get my phone after 30 days and that they will call me. I patiently counted thirty days, hoping to get a call from them I didn't get a call from them, up until today... I had to call them so I could find out what is taking so long, no body has an answer for me but keep on being told they will call me but they never do. I am having a bad experience with their contract and make no mistake they don't miss their deductions monthly - it's painful to pay for something you do not have. I REGRET TAKING A CONTRACT WITH THEM.