Deducting more money than the signed contract

<p>I have been debited an increased amount on my membership although I have not been with the gym for a year. after putting in a query on the 3rd of December they phoned me back today and said they can not tell me why this happens and should I cancel the debit order they will charge a penalty of R1500. I have kept paying although I am no longer a member there because I have signed a contract but they are not allowed to increase the price before a year and without notice. I am no longer in the area but they  also have no exit clause for people who live in another area. They are not even willing to let you find someone else.</p>