Moved from Sky to Virgin, Sky didn't cancel

Ayr_Rage

Opening emails is safe, links may not be.

If the bank reclaimed money under the Direct Debit Guarantee when in fact they were taken correctly as the TV service had not been cancelled then that's another whole can of worms.

Subsequently cancelling the DD with an active account would have prompted Sky to bombard any customer with emails and possibly letters.

You still haven't said if it is Sky or a debt collection agency who is now chasing them.