contract cancelation unsuccessful due to change of terms and conditions

my name is Loyiso Maliza, I contacted Cell C customer support today 8th/12/2022 to cancel my month to month Data contract. It was told that since February 2022, the terms and conditions of this contract have changed, no one called me to inform me about these new changes. I only singed up for this particular contract because it was a month to month bases and I can cancel it at any time I needed to, Now I am stuck with a contract that I don’t need, the network coverage is an issue, 80% of the time the sim card does not have a service.

Additionally, this is the second time I have received such poor service with Cell C. Prior to this, when my Data contract expired, Cell C changed the monthly costs without notifying me. When I investigated this, I was told that an SMS had been sent to me, I have explained to their sales person that an SMS does not work for me since I mostly work in area without a cellphone coverage.