Debit order after contract ended!

My husband joined virgin active over 2 years ago. His contract ended a few months ago yet virgin active was still deducting money from his account. Today he got a call from virgin active saying he owes R300+. How is this possible when you guys have been deducting money every month even after his contract ended! If anything virgin active is the one that owes him money. What a huge disappointment from virgin active to actually do this to customers where they deduct money from members on top of that it's almost double the amount initially agreed on. Can someone explain this to us! I need this sorted asap, my husband wants his money in his account as in yesterday.