Disgusting service

On the 30 April I came to a shocking debit order of R1316.04, I contacted their customer service line. The agent told me that apparently that my Data sim was uncapped, that I was not aware of because the agent (Doris) who assisted me at the store with the contract did not break that too me. I was advised that I should go where I open the contract. when I went to the store I found Doris who seemed clueless of what was happening she just told me that she will lodge a complain on the accounts department and that she will get back to me. I have been the one who keeps on making follow ups on this matter no one seems to be willing to assist, all I'm being told by Doris is that I shouldn't worry she will sort this matter out. Even the store manager (Tisetso) was totally useless, he did not even try to understand the roots of the problem...he was just glued to the screen of the PC with no valid explanation. I want the extra money that was debited from my account to be refunded. This is pour BULL****!!!1!! Honestly....If I cant be refunded, its only fair to ****ing cancel the Damn contract with Cell C.