Still waiting for my phone...MTN!!!

I sent my phone for repairs on 28/02/2015, was told that the phone will take 2 weeks (still waiting for my phone). I called MTN and was told to call the repair centre (HVRC Repairs), sent an email because the line just rang till it disconnected as their lines are busy, was told that I have to pay RR4260.10 for repairs to be done, only paid R330 on 22/04/2015 for my phone to be returned unrepaired, till date I haven't received any feedback from MTN I'm still waiting for my phone because the insurer said it will take over, and I need proof from them to show that my phone has been there since the 28/02/2015. I am so disappointed with the service no longer interested in upgrading.