Cancelling a gym contract

Reasons for cancelling my gym contract. No proper communication for membership type was offered. initially I was offered the price of R185 to join and a monthly subscription of R285. I stay in Cosmos City so I was told to use the Northgate branch. On the second visit to the gym I arrived after 4pm and was then told that I cannot attend the gym at this time. I was never told that I have an Off-peak contract. This meant that I would have to pay an extra fee of R60 every month in order to gain full access to the gym. I have concluded that initially this agreement was not in good faith. Secondly i believe this is an option of a 12 month contract on the forms but the consultant automatically signed me for a 24 month period and i believe this was done for commission reasons. i was told that i should have read and understood the contract but i was on my way back to work after my lunch break and i fail to see how i would have read and understood a 2 page document in a short space of time. i have since instructed my bank to cancel my debit order every month and i am also refusing to pay a cancellation fee. it has been 3 months and my contract has not yet been cancelled.