Fed up with Vodacom

Good day. I have contracts with Vodacom now for a few years but have so many problems at the moment. I had 2 new contracts taken out on the same day, one just a bit cheaper than the other one. When it came to the end of the contracts, I called in a month ahead as required for both of them. With this, one contract was captured incorrectly and the end date was 6 months after the other one. That was problem 1. I phoned and phoned in and after a few weeks, managed to get this "sorted" out. Then came the shocker. I never cancelled the contracts and was still billed for it. Phoned again, same problem, the one contract ends 6 months after the other one.........I never phoned but I had the reference numbers which was changed to the data sim I had which came with the laptop and didn't pay for that, that was cancelled!!!!! Again I phoned, went into vodacom myself, spoke to many people, argued the same problem and one person phoned me back and that was sorted. Now, there is a debit order going off my back for vodasure, again, not mine. I pay the account via vodapay. Phoned again, held on for 18min + and they promised it would be sorted out, paid back etc. Not happened. This month again, same issue, debit order for vodasure, phone in again, I am sorry for the inconvenience, and asked them to phone back as I am at work and this is not my fault that they do not fix problems. Every month I spend so much time on the phone with vodacom to sort out their mess, and no one does anything!!!!! I am at the point that I feel like this is ***** as I asked for proof where I signed for insurance, not received, on which phone it was, neither of the 2 on the contract. Its like walking into a wall and vodacom just takes and takes and takes.