MTN

My Blackberry completely froze and I cannot use the handset at all - I took the phone into MTN Sandton for an upgrade and they said the Computer says I had an upgrade on 1 August 2014, which I never did - They then informed me that it is for me to prove differently, but how can I prove something that I NEVER Requested in the first place ?? Sandton also told me to report a ***** case to the SAP - God only knows why, when the matter is an internal MTN responsibility. I then called the MTN Call Centre who told me the same and that I am tied into the contract until 2016 - NOT !! I never agreed to this and nobody can provide written evidence or a telephone recording. I don't accept the fact that I was initially a Nashua Mobile customer and that there are no records and I can't cancel, otherwise there will be penalty fee's.