VODACOM not living up to promises and just wanting more money

I need help with Vodacom. I have been a customer for 20years. Not one single month have they needed 1cent from me. I also have multiple phones on my name and my monthly fees are quite "steep". However, I have been struggling for more than 2 years to get certain numbers cancelled which I don't even have, but I am paying for these phones every month - monthly airtime, etc. I have tried every avenue of getting these numbers off my name. I have been inside different stores 3 times. I have called a cell number as well as the *** (I think) on several occasions. There were also other numbers and e-mails. Everyone promises to assist, but no-one does. I have spoken to more than 30 people. Eventually I spoke to someone (cannot remember the name - it is written in an old diary as I work with a diary) who could help. This gentleman even discussed the matter with his supervisor whilst I was on the phone. The supervisor acknowledged that there is indeed a cancellation request and that it will be done and all the money I have paid for over 2 years will be refunded. Until today, this has not happened. I was also given a wifi rooter "free" as a thank you gift for being a loyal customer during a promotional drive. I actually asked the lady to confirm (more than 5 times) that this will NOT affect my monthly fees and she confirmed every time. I received the rooter and then received a bill. Needless to say, I had endless arguments with them and upon request for the recording of the telephone call (which I am entitled to), they refused access and agreed to take the rooter back. During my last upgrade, I actually took 4 x HUAWEI phones and I also have a 5th phone on my name. The HUAWEI representative was in the store and I was promised a gift due to my huge purchase. I went back twice thereafter, and the representative was there again on one of these occasions, and now she said that she first has to "check". Until today, nothing has come from this either. In the meantime, I am getting daily calls from Vodacom to just take more "services" despite many many more calls and visits and nothing has happened in any of these occasions and Vodacom is literally *****ing my money for more than 2 years now despite me being a grade "A" client. WHAT CAN I DO to get my money back ... and possibly the promised gift ?