Vodacom + Promises = Useless (Breach of contract)

So in June of this year I was contacted by Vodacom online upgrade center, as my contract was past its upgrade date. I at first did not want to upgrade or continue with Vodacom due to past issues with billing, data on my contract to be exact. So the gentleman I spoke to reassured more than once that i will receive a gigs data on my contract and 10 gig for the first 3 months. None of this happened. My first month I received the 10 gigs and there after only 650MB. I started calling Vodacom and being transferred from person to person I decided to go to the Vodacom shop where I original took the contract with. Of course nobody there could help me and i had to start the calling process over again. 2 Days of struggling to get through to the correct department i asked to speak to a manager. I eventually got through to a Brian. He assured me that he will listen to the recording that was done in June and get back to me the next day. When the next day came i was waiting patiently for Brian to phone me. And AGAIN THIS DID NOT HAPPEN!!!! I started calling him at least twice a day and to my surprise he was either never there or was not available to take my call. So trying to get hold of him for the next 2 weeks was like pulling teeth. Today I eventually got through to a Zandile who again assured me that he will take it up with his manager and that I will receive a phone call today. AGAIN THIS DID NOT HAPPEN!!!! After requesting the call recording more than once i have yet to receive it. I will give Vodacom until Friday 14/09/2018 to get back to me with an answer. If i do not receive a phone call I will stop the debit order and Vodacom can come and collect their phone. I have always only been a loyal customer but i am fed up. Either you honor what was promised to me or cancel the contract.