Contract has expired but still they run deb orders

I took out a contract for a period of 12 months, broke my leg in three places and could not gym for the said period. In retrospect my accountant no picked up that even though I paid for the 12 month contract period that has lapsed 6 months ago, virgin active is still running their normal premi against my account which I feel is theft, as they where notified of my injury and that I could not attend to gym whilst being in a moonboot for a year. what is the sense of signing a 12 month contract when they still ********ly run debit orders against my account when the contract has expired!!!!!!