Shocking service at Vodacom

Shocking service On 29 July 2021 I was contacted regarding upgrading my contract. I asked very clearly how this can be done as it only expires in December. The consultant told me that it was okay to upgrade from the 19th month. Got a good package deal and proceeded with the upgrade. Still have the SMS that states it will run till 31.12.23. In March 2022 there was an increase from the original contract price R275.99 to R303. I queried this as I am under the impression that a legal contract price is valid from start to finish of contract. I was told by Kaya on 1 March2022 that Vodacom can increase a contract price anytime they like! Okay, South African law is not a proper working law so here we go with the new rate. Now again the rate increased and upon calling nobody at Vodacom can give me clear answers and I get sent from pillar to post. Ashanda at customer queries says it is because the Promo discount doesn't apply anymore and transfers me to Precious at contracts who states that there is another increase in September 2023 and wants to transfer me to customer care??!! WHAT IS HAPPENING.???