Lack of response from MTN

On Monday 28th March 2016 I laid a complaint on Hellopeter against MTN regarding my cellphone contract. On Tuesday the 29 March 2016 I received a response from MTN, from a person by the name of Kevin who informed me that an escalation had been sent to their Telephonic consultants to assist and track the handset mentioned and he promised they would call me later that day (Tuesday 29 March) to let me know what was going on and to assist me further, to this day no one from Mtn has called me. As I never got that call from MTN, I am still waiting for someone to assist me and every time I call them no one ever gets back to me. I am tired of MTNs false promises and very disappointed with their service, I would greatly appreciate if someone from MTN could call me back urgently as I am losing patience.