False contract

Gym company is a ****. I have contract with them that state that i pay annual levy fee in november the very same contract states tha service fee is charged on the anniversary of ur joining month. In feb i got a double dr frm them of which i did not understand when i enquired to find that it was levy fee of which i reversed as its not as per contract. I was not able 2 gym 4 march as they demanded the levy fee evn when my membership was not overdue. On the 25th of marvh again they dr me R199 of which is my membership premium & an additional R80. I have a 36 months contract with them but i want out how do u stay with peple who can not honour what they wrote on their contract.