Vodacom will upgrade your contract without your consent

Vodacom will upgrade your contract without your consent!!!!! I received a call from Vodacom consultant telling me my contract will be receiving price increase and there is nothing I can do about but they will give me abit more data as well and I have no choice to it!!!!!! I told him I want to cancel my contract since I now have a fibre contract from Vodacom and work from home he told me I can’t cancel it to August. I explicitly asked him that these changes you are making to my contract without my choice will they affect my contract duration and me cancelling it and he said NO. The next thing two days later I am getting an sms about a contract upgrade to 2027!!!!! Which I did not consent to. Why is Vodacom doing this to me I have been a loyal customer I don’t want your ******** upgrade I don’t want it!!!! Why are you *****ing my money why ??? No no no fix it. This is wrong