They just don't give a damn

My tablet's screen blacked out and I need to have it repaired. I went to Mtn in Cape Gate on Wednesday, 27 January 2016 to ask about an upgrade as I am due for one on 01/03/2016. I spoke to Jaco who sent an email to \retensions\" and told me I would be contacted. On Thursday I again went to Mtn in Cape Gate and told Jaco that I had not heard anything. He said he could not do anything and that they would get back to me, but if I wanted to I could call *** and ask for assistance. I phoned this number and Cerryl Muller ***) said she would take the matter up and escalate it. It is now Monday, 01/02/2016, and still nobody has phoned me. I am asking to upgrade one month earlier as my tablet's screen has stopped working and nobody comes back to me! I have 3 numbers with Mtn for the last +/- 10 years (had 4 but my son took over his own number) and do not owe them a cent, they get all their money every month. But as they say, if you want loyalty, buy a dog!!! You are just another number and a clerk, with no discretion, makes the decisions. I have tried to speak to somebody more senior than a call center clerk, but to no avail. I suppose nobody will look at this either!"