Gross ********* behaviour by virgin active

My husband and I moved into a new area recently (temporary move). There were no planet fitnesses around so he decided to move his gym membership to virgin active. As we are only in the country for a short period before our travels, he decided to sign up for a month to month membership as opposed to a 12 month contract as he would only require the membership for month of May and June 2023. The sales person however talked him out of this and told him it would be financially cheaper to take out a 12 month contract as virgin active’s cancellation fee is equivalent to 2 months of the contract amount. So today we go and cancel (should have done it last week, this was our bad). They give us the cancellation fee and it’s like 3 times the about we were expecting! They explain to us that virgin active has changed the policy and now cancellation fee is 40% of outstanding contract value. Please note that we did not receive any notification of this “change of policy”. I am absolutely disgusted by virgin active and their ********* behaviour- unilaterally imposing contractual changes without notification! Ps the actual staff at the virgin active (Edenglen) are lovely and trying to be helpful but their hands are tied behind their backs.