Poor pathetic service

I have been with CellC since 2006/2007, but never have I been so extremely unhappy and frustrated with their service. I have three contract lines with CellC of which two of them are only data simcards. I renewed my 1 data simcard contract in July. The consultant who assisted me said I'll be receiving a new simcard and that I should call in and have the previous router contract cancelled. She assured me I was going to keep my same number (084...14). I followed the instructioms as told, however I received an sms to my other data sim(074...00) that the contract cancelation on it was successful and the data that was left on their was removed. Totally confused and puzzled by this I contacted CellC and discovered that I had a huge bill due for August, almost double than my usual. And to top it all I found out I also have a new contract line! (061...19). I never received my data back on my 074...00 number. After numerous calls and complaints I haven't received ANY feedback whatsoever. They deducted that huge amount from my account, this after I called them two weeks im advance to fix the mess. CellC expect me to pay for mistake that their consultants made. No one even bothers calling me back with a solution to the problem they created. This is the most pathetic service I have ever received from CellC