Cell c pathetic

Once again cell c has messed up upgrade. 2 years ago they did the same thing i wrote a review and they fixed it now looks like the only help ill get is by writing another 1. 2 weeks ago i upgraded and took a new line only to find out after being billed that 1 number doesnt exist. I also find it strange that i passed authentication one number yet failed on the other. You have billed me yet you say my card is not activated. Now told i need to go to a cell c store. I opened the line and upgraded over the phone why should i now go to the store. If this issue is not resolved i will reverse the debit for the last 2 months and u can come and collect your phone and cancel my contracts. Please call on *** to rectify this stupid error. Thats my prepaid number.