Useless as usual but I don't learn

I'm so fed up with the pathetic service, and I'm probably going to wait another 10yrs for someone to call me. I did an upgrade on the 20th October through the call center, evertime I call they tell me the contract is being cancelled on the system and I should go in store to go upgrade and pay R150 that you probably think grows on trees. I did the upgrade through the call center so I don't have to pay in store. Twice 2 consultants told me they going to call back and never did. One promised 500mb for 12 months if I upgrade in store. So the way I feel I should cancel this damn contract and move to another mobile network. This is how u lose clients cos of pathetic service. If I don't a call before 10am tomorrow morning I will Def cancel.