MTN Staff rude, phone still not fixed and unusable

Since June this year, my Sony Phone has been broken - even though I got it from MTN with my contract in September 2014. So - 9 months old.<br> I have had it in for repairs at MTN College Square, Bloemfontein, and at the MTN Service Centre in Bloemfontein 4 times - and still the phone is broken. The staff at the repair centre have been extremely rude and unwilling to help. The last time I was there - 26/10/2015 - I asked to see the supervisor, Johannes - but despite being called a number of times he refused to see me and I left still with a broken phone. I am still paying the contract fees - but do not have a phone...<br> I submitted a complaint to MTN on their website on 09/11/2015 - MTN REQ:*** - but no surprises - they have not even bothered to contact me regarding my broken phone. Where do I go now to get my handset fixed - The MTN staff at College Square have confirmed it is still under guarantee - but still no help... <br>