Lowest form of client liason

I am unfortunately one very upset client after 12 years of being with Vodacom. Last month I did a premature upgrade with the promise of my contract remaining EXACTLY the same. (INCLUSIVE OF MY FREE MINUTES AND FREE DATA) and the only extra expense would be for the new handset until June (when it is due for the upgrade and would go back to R450 (THE CONTRACT INCLUDING THE FREE MINUTES AND DATA)I am currently soft blocked due to the free 100 minutes not being loaded. I have called the customer care line and logged the complaints till I've exceeded the call limit to the call centre. I have spoken to 2 team leaders that have promised to get back to me and I still find myself waiting for someone to resolve my problem let alone get back to me. I eventually got through to the retention department in jhb this morning with instructing the agent to write my number down incase we would get cut off before starting the security check. We got cut off as it started and yet no call from him.I have spoken myself stupid with the numerous amount of people from different departments in vodacom to have my issue resolved and still no such luck. This is the most low form of customer liason I have ever