Double billing and untrained agents

Firstly I hate how Cell C inconveniences me with poor network. I have had my contract for over a year and now 9 months down the line they cannot debit my account for some reason. I was now billed extra charges for late payment! I called in to rectify it only to find my account details were changed I don't know by who! I was told by the agent to deposit the current outstanding instalment at the bank because she cannot resubmit for a debit order to go through due to the updates only being effective next month. Once I have made payment at the bank I get another sms saying the debit went through. I have been charged now twice and I am now told I will get my refund after 7 working days and that makes me sick!!!!<br> <br> Cell C still owes me for the extra charges that I was billed for 3 months that they couldn't debit me due to their internal problems. Cell C is just bad. Not happy at all. The network is just worse!!!!!