Receiving letters addressed to someone who has never lived at this address

Hello,

Please can someone from Virgin Media help me? 

My mother-in-law recently came to stay with us while she waits to move into her new house. She temporarily transferred her Virgin Media account to our address while she moved, because she didn't want to pay a cancellation fee. Upon doing so, she was told that we had previously had Virgin Media at this address, which is incorrect as the previous owner was an elderly man with dementia who didn't have any form of internet at all. BT had to come and install internet access from scratch when we moved in 3 years ago. My MIL has now cancelled her account altogether as it turns out Virgin Media doesn't have coverage at her new address.

We have now received several letters and parcels for someone named Steven Andrews, who has to my knowledge never lived at our address, saying that he needs to return his Virgin Media kit or pay a £40 fine. It also says his details may be passed onto a Debt Recovery Agency. I don't want bailiffs turning up at my house thanks! 

Please can we get this sorted? I don't know how else to contact you as there is no email address or phone number anywhere, and the web chat doesn't work if you have a complex query!

Thanks - Chloe