Cancelation/Still Debit Account/No Feedback

My husband was a Vitality member of Virgin Active for years. He put me on he's Vitality as well. He was the main member, we had 1 contract with them. We got the news from he's Work that as of August 31st 2015 they will no longer required he's service. The work contribute to he's gym cause he was on Discovery Medical aid which the work also paid for. After receiving the news he then immediately phoned Virgin Active and Cancel the contract as we cannot effort the payments without he's works contribution. We decided to move to Herm**** to start a new life. Since he cancelled the contract, they still debited he's account. When we phoned to sort out. They said they deducting money for Me, thinking I was still going to the Gym. My Question? I was on my husband's account. He was the main member. For years they debit he's account for both of us. Why now that he has cancelled the contract do they debit he's account for me without any notice. They requested a letter from he's work as proof that he no longer work for them. We've emailed everything through as requested. We don't get any reply from them, just a phone call. We need to solve this asap as they will still deduct money. Bad service!