PATHETIC service

Vodacom has billed me R8000 for data in October. After phoning at least twice a week for every week, repeating the same security checks every time (don't know why the bother giving a reference number) all they do is making EMPTY promises to phone me back NO ONE EVER DO. All you can talk to is a useless call center and that's were it stops. They have some elusive back office which nobody is allowed to talk to that is suppose to handle my complaint but I doubt the existence of this back office and its only another excuse they use