Membership benefit removed early, even though they have taken your payment

Due to COVID, I can no longer attend gym. They had and discontinued a digital option at a reduced fee. So I need to cancel (the freeze fee is very expensive) but when you tell them to cancel, even though you have paid, they discontinue your membership and you can no longer use the facility for the month you pay. In addition, at the club (Steenberg), they are not careful; masks half on.

During the time I was a member, regardless of how often we ask them to prepare a studio by putting on an aircon or closing blinds before the class, they could not even get that right and the sun baked in and made the class impossibly hot.