Cell C doesn't care about customers once signed up

I signed up for one of Cell C's data promotions which costs R699 per month. However, the very first invoice I received was for R2815.61. I have called Cell C to get to the bottom of this and I was told that the billing department would look into it and contact me within 2 days. I called back after a week of silence and was told that the case would be escalated. It has now been 2 weeks of silence and my debit order date is drawing ever closer. So I called again only to be told that the case has not been resolved, it will be escalated again. The person that helped me did however say that if they debit the incorrect amount I will be credited once the case is resolved.Wow thanks. You have had 2 weeks and counting to resolve this issue! How can a company be so pathetic? One month into the contract and I am regretting signing up with Cell C. If I am debited the incorrect amount I will have the transaction and each subsequent incorrect transaction reversed until you call me and prove that the issue is resolved. Only then will you get your money. I think if Telkom had bought you out it would have improved your operations and service, and that says a lot about you, Cell C.