bad bad service

I overpaid my Cell C account on the 17.04.2016 and the called the call centre about a refund. I was told that the payment needs to reflect first and I need to wait till the 18.04.2016. I phone on the given date and spoke to a very nice lady who said she would log my query and I though she did. She did not. I phoned again on tuesday 19.04.2016 and the agent kept me on the line for 27 MINUTES!!!!! Still no reference number or feedback. I then called again and asked for a manager and I was cut off twice!!!! All this time I have no money and my account is still not refunded. If I go to my bank then I am charged service fees that I have to pay. Please get someone to fix this or really I will go further with this.