Worst Service for the 2nd time.

I booked in my phone on the 17th of November 2014 for software or power or something and only took collection of the phone on the 6th Of January 2015 due to them taking forever to repair my phone. Then 3 weeks later is broke again with the phone not switch on, booked it in on the 29th of January 2015 and still waiting on the phone apparently it is fixed (so they say) but never sent to the repair center and is still at the workshop I have been calling for weeks. 2 weeks back they told me they will put in a comment and ask the workshop to get the phone ready as I am going to collect and that I will be calling back to confirm if it is at the repair center. This morning I called again and they tell me it is still at the workshop and that they have to find the phone. How can this happen to me twice in total the phone has been lying at MTN for 83 Days I have made 3 Payments for a phone that I don't have. I have been forced to get another contract with Vodacom due to the fact that I don't have a phone to use and don't want MTN again. My Job Card Ref: ALWIC ***