Still being charged for account cancelled 7 Years Ago

We cancelled our account with Earlybird seven years ago but they never put the cancellation through on there system and have continued to take their monthly debit order. When I phoned to query this their response was just send another cancellation email through. Totally unprofessional and unacceptable! What about the seven years where they have been debiting my account, yet never received a single statement or any form of communication from them.