Horrible service, not a service provider to be trusted.

I entered into a 24-months contract with Vodacom which was supposed to end in 10 September 2023. now i find myself having to pay for services that i am not getting. they have increased the payment without any communication, and decided to upgrade the contract without my consent. I feel like my rights as a consumer and South African citizen are being violated. I requested them to close the contract since the agreement was based on 24 months with no assistance. the last time i used their service was beginning of September as per the contract but i find myself having to pay for october and full september and even beyond the agreement a R1805 , for a contract of R399, which i questioned and they said i am in arearr for something i am not getting any service. i paid that amount and requested to close it, but now i am sent to post and Pillars every time i call. i have to wait for 30min every time i call but that was not the case when i was opening the contract. The line is suspended with me not getting any service but i am still told to pay another extra R700, why are we getting exploited by these data service providers? i need assistanceeeee.