MTN is unbothered by my dissatisfaction with them.

I have been having a problem with MTN insurance and the repair centre. My phone was sent in for repairs on 17 November 2014 and to date I have not recieved it or recieved any feedback on it. I have been calling the call centres (mtn insurance and the mtn HVRC) and did not get assistance, I wrote two hellopeter complaints, spoke to a supervisor and sent him an email expressing my dissatisfaction, sent tweets to the @MTNza account to complain, sent 3 emails to their complaints department and sent an email of complait to the HVRC and not a single one of these has been responded to. I have recieved shocking treatment from them and whats worse is they are not even interested in my dissatisfaction with them. I regret the day I ported to MTN.