Pathetic services from MTN

I am so totally disgusted in the service I am getting from MTN. I have been a loyal customer for more then 6 years but the way they treating me is utterly disappointing. On the 15th of May 2015 I took my Tab 3 in for repairs, as the phone would not charge nor switch on. Furthermore, I got my phone back after 20 days in which its states in their contract you will get your phone back in 14 days. I took the phone back on the 18th of June which is on a Thursday. Ever since then I am struggling to get the phone repaired and back. I am phoning and was at the branch numerous times with no success. The branch manager does not even assist you send you to a consultant whereby I am getting answer like, MTN is on strike, they don't get any response from repairs department etc. Up until today I don't have the phone, still in the branch not even at the repairs department and its going in for 4 months that I am struggling with them.