Contract hassles with Vodacom

I received a call from an agent from Rewards Co. with an offer to increase the package. I informed them that I am not interested in a new contract/upgrade and they assured me that it would be a small increase from what I am already paying.

I have been reached out to Vodacom multiple times, seeking help as the package I am being billed now is way too high for my affordability. Furthermore, I know realise that my package was upgraded, whilst I didnt receive a new handset. So I cant even upgrade my contract to get a new phone. because the Rewardsco upgraded my contract for me.

I am not happy with the service from Vodacom and RewardsCo