Upgrade not registered on system

Hi. After numerous frivalous attempts to get my account sorted I have finally decided as my last and final attempt to rectify my account by resorting to complain here. I upgraded my contract on 1/08/2015 by the 20/08/15 no upgrade on my account has been registered and I was notified via email etc I am eligible for an upgrade. <br> <br> I then went back to the mtn store that assisted me informed them of my problem they then said they would rectify it. The next week no upgrade has been logged I went back to them and was informed they have not done it yet but will do it now. <br> <br> I brought it to their attention that my account for the month was R350 more than it was supposed to be, they said they will sort it. <br> <br> I have since gone back to them once, called mtn customer care numerous times to no avail, when I finally got to someone willing to help the line got cut and I could not get back to him. I am as of a few weeks ago completely unable to reach the 808 number from my cellphone and need to borrow an mtn phone from someone else to get into contact with 808. <br> <br> I am therefore unable to get my account sorted via customer care nor from the store who assisted me with my upgrade. Please help