Vodacom *****ing from Customers

Hi this is a very unhappy customer about customer service. It's the worst service I have ever seen so far. There is an over payment on my account and we started on 9 of Mar with the refund and after 3 diverent supervisor en 20 call later still no feedback of were we are and what is going on with the refund. If you get an call its after 11 at night and the same storie need to be xplain over and over. There account people are clueless and want me to send proof of payments to them. I have send it more than 10 time and still no reply ore feedback from them. This is *****ing money from there customers. If this is not resolved by the next few days. I will open an case of ***** against vodacom at the police.