Dissatisfied customer of 15years

I have handed in my Blackberry 31/03/2015 to get repaired as it was unable to switch on, and update the data. Its been over 2 months now and no one has had the decency to contact me and advise me. I have been calling and calling, leaving messages to be contacted, emailed and still nothing. I talk to MTN staff and they dont seem to care regardless. The last communication had i was advised they are doing stock take on the Friday and will contact me the Monday to advise if they are able to replace my Blackberry, but if they dont have the Q5 then tough. They cant help me. Bad attitude and service and Cell C is looking really good as they will buy out my contact and keep my number - after being with them for so many years, makes no difference I'm just a number