Poor service

Vodacom marketing phoned and offered a data deal to be added to my package. I was told that it would not affect my monthly bill, but in fact that my bill would be reduced by R50. I was sent a sim card which was separate from my current number. I phoned and queried and was told I can use it for a hot spot. I did not need it as I have a fiber connection at home. I then requested to cancel this offer. This is where the frustration begins. They lie to me, and still bill me an additional R184-00. Now I am trying to get a credit. I have 5 ref nr's, have been in to the call center in a que for 2 hours and still don't know whats going on. I am told my query is escalated every time I phone, but no one comes back to me. One lady, Lydia phoned me back and told me she is getting no response from the accounts dept. This has been going for more than a month now. They are the worst organisation to try and solve an issue. will never discuss any possible deal with them telephonically again and will never recommend anybody to support them.