Debitsuccess Ltd

Resigned from gym on 27th February. Gym Terms state: "You shall not consider that your membership agreement has been terminated until such time as this is confirmed in writing to you by DebitSuccess (not more than 14 days after the termination date). Termination of your membership agreement will also terminate the Direct Debit Request Authority." It's been over 3 months - when will the confirmation be sent? Debit success and the gym make cancellation a difficult and painful process with terrible communication.