Worst customer service

The worst customer service I have ever experienced. Does anyone at cell c know what customer service is. You make promises you never keep and the people in your billing department are *********** at best. I have struggled with cell c for the last week trying to get someone, anyone to help with a billing error. I have spoken to Pineo in customer service on Thursday and she promised to call me back that day. I am still waiting for that call. I spoke to Marvin in cancellations who was replying to an incorrect reference from your customer service centre. I spoke to Thabiso in customer service who told me that the last person who tried to put me through to billing was incorrect because billing doesn't have an extension line. I spoke to Sheldene a manager in customer service midday on Friday and she assured me that she would be taking over the case and I would hear from her soon. Still waiting. The billing error has resulted in me being debited just under R4000.00 incorrectly. I have no funds available in my account for my future debit orders to go through but none of this seems to even register on your radar. I demand that this money be credited to my bank account on Monday. I cannot