Bad customer service Mtn Modimolle

I have a 3 contracts with mtn in Modimolle and in January I had an accident at work were I felt down and the phone got damaged on the screen, I took it to mtn as I have insured it for replacement. Since then I never heard anything from them until I called them 2 weeks ago in April and they I can't get another phone as the simcard that was supposed to be inserted was not in the phone that moment, of which I never opened that phone since I received it. I took the phone back to mtn twice because of it software problems, not connecting to internet, no goggle and wats up problem before my incident but I was not assisted. They knew their phone had a problem at first but now they hidding behind IMI numbers and simcard instead of giving me another phone.. I feel ****med by Mtn hence paying more than 800 on them.