Wrong BILLING STILL NOT CORRECTED AFTER PROMISE

I have a contract with Telkom Mobile (8ta) for R250pm for R15Gb data. December I received my account, which said i owe R865 instead of the expected R250. I immediately enquired about the amount. They said they will investigate and get back to me when I called the call centre. Two weeks later nothing had happened and then the month was January. I called them and they told me the same thing.A Telkom representative eventually called me from the billing the department.<br> <br> He told me my contract had expired and therefore the special had expired and that I was liable to pay a new monthly fee of R865 (R199 for 10GB +R865 for the 5GB). I explained to him I was not aware of that. I thought I would continue paying R250p/m and I was not notified about the potential rise in cost, which I had not budgeted for. I asked him to find a solution and on the 20th of January he called and notified me that I won't be liable for all the extra cost (R865) but just the regular monthly. He recommended I cancel my contract to avoid the cost or renew. I opted to renew and he told me to go the store to renew. In February I received my bill and they claim I owe them R865? I thought this amount was cleared.