Virgin Active do not want to cancel a contract due to serious medical condition

I've been trying to cancel my wife's contract due to a serious medical condition and they say I must still pay a cancellation fee of 30% and to top it off I asked Sheryl for a phone number and name of a manager that I can talk to and no response, even though the email was read. I will get the bank to reverse their debit order at the end of the month and will then see how quickly they contact me. I find this absolutely shocking that in a way they are forcing my wife to gym so we do not lose the money at the risk of her breaking her back or such and then for me to sue them for millions versus a measley R1300.00. This is totally unacceptable from this so called "health" concious club.