Cell C - MTN

I was recently informed that the Cell C LTE month to month contract I have with Afrihost will be discontinued. I was given the option of migrating to MTN or Telkom. I don't want to make use of MTN and especially not Telkom, this would then lead to an R1000 penalty for cancellation. The fact is I'm not cancelling the service, Cell C is discontinuing it and Afrihost is forcing me to continue with a contract that I'm not interested in. I signed up for Cell C LTE, not MTN or Telkom. Afrihost is breaking the contract but wants to hold me liable for a penalty.