Clerical Messyup and refusing to fix their error

Was signed up for a contract October 2020 for access to their Milnerton Branch only to find out that could only access their Parow Gym which I clearly indicated on the application form which have the copy of I have been asking them to fix it for few months now. I now refuse to pay my membership I refuse to go to Parow it's way to stuffy and small in that place