incorrect insured person, incorrect beneficiary but you are DEBITING my account

My parents had a policy that covered both of them according to the policy taken more than 20 years ago should a spouse pass the living spouse will be covered with no premium. My mum passed 10 years ago the policy paid out. The debit order was meant to stop. IT DID NOT.

Called your customer care department they dont have my dad as the insured then why are you debiting his account. The insured person is incorrect the beneficary is incorrect. BUT HIS ACCOUNT IS STILL DEBITED.

Policy number: ***.

What you debited over the last 10 years is more than the supposed payout. Kindly refund the premiums that have been taken over the last 10 years.