UPGRADED IN FEB AND STILL NO SERVICE

So in February 2016 in upgraded both my data and my voice line because every single month 8TA would bill me incorrectly. And when I finally did my data contract I noticed that I was not receiving any data. I informed the consultant at the Clear water mall store where I did the upgrade as I took her number and she said she would look into she was not at work. a month went by and she never got back to me. I then contact the call centre in the same month seen that I never got feed back from her and guess what I still haven't heard anything form 8ta. Informed them that I will not be paying the bill until they fix my contract. And according to them my contract was changed in the store to pre paid.Finally after sending Mpumi msg after msg she decided to assist and told me that the very next day I called in to the call centre and asked them to change my contract which just upgraded to pre-paid. Now why would change my contract to prepaid that I just upgraded a day ago. Telkom cut my lines and still have not fixed I was forced to pay the account to get my other line open and today I'm paying for a contract which is pre paid and all they can do is credit me but the problem is not resolved a