CELL C Customer service for contact cancellation

In Kolonade, after confirming why we there we stood for 45 min, with a baby, referred by a person working in the same dpt, to be confirmed by colleague that canc are not done in branch, we need to call it in. Then Rudolf de Kock call 08/12/2015 and was advised of 30 days notice and that it will be canc by 08/01 but then we would have paid for Jan 2016 already but only have up to 08/01 to use it. Rudolf then advised that we will phone back later with an instruction which he did 31/12/2015 for canc 31/01/2016. On 08/01/2016 the contact was canc and upon request the operator insisted we did give instruct to canc 08/12. We ask for recording, refuse to mail to us, we must go to branch, which were rude and very unhelpful in the first place. We know we didn't give instruction 08/12 but only 31/12. We want this to investigated thoroughly and we want to be reimbursed for the cost because of the error on Cell C's side, We will not pay for Cell C's error. I am in the customer services myself and was shocked by the lack of TCF (treating the customer fairly). Personally we have never been treated this way. I expect Cell C to do the right thing