uncontested charges

So last week and Tuesday I recieved a statement from telkom which stated that my contract amount due is R637 of which my normal subscription is R275-R300 depending how much Igo over. However I got worried and contacted the call centre and after probably 40minutes of waiting on the telephone line a agent picked up. I then explained my case to kalibogile and he explained to me that the statement I recieved was wrong and that the amount due is R136 (which I saw was the previous months statement). He however mailed that statement to me and I rep**** with the 1 that was sent to me. He then phoned me back and told me the reason why I was charged so much is because the 5g I recieved for the past 2 years on my contact was on a that premotion only and that I am being charged for the data given (which actually expires after 2 months!). I then told him that this information was neva arranged or informed with me. He then lodged my complaint and assured me that telkom will contact me and the money charged for the data will be deducted from my account. Yesterday I recieved the same statement , contacted the manager (Aphiwe) which neva came back to me