New commitment penalty added without consent on all Cell C contracts

I signed up for a a sim contract on a month to month basis with Cell C almost a year ago. I called the cancellations department on the 08 February 2022 to cancel the contract and was told by the call agent that there is a commitment fee of R9990.05 to be paid. This is ridiculous as I did not receive any device and also this was a pure month to month arrangement. On further investigation I was told that this was a new clause added to cell c contracts. Really??? Who consented to this? I demand that we not be looted by Cell C.