Pathetic and unprofessional service from Vodacom

It's been over 5 months now Vodacom still cannot process a credit note of the money deducted without my authorization. Since January it's now June they have tried all their means to drag the process claiming the amount due was credited into my account till they ran out of options. After so many phone calls I have received an sms on the 08th June 2018 that the refund has been prepared and sent to management for approval few minutes later another sms claiming that the query has been resolved and now closed. today I just followed up with another phone call to my surprise they logging another call for me really? on the 08th June I have personally requested to be contacted telephonically with proper feedback they have also failed to do so. what a mess