Basically I have just had a phone call from my old ISP from around 2 years ago saying I need to pay them £400 for there services from then until now. What happen was that I normally get a letter each month saying that I need to pay them for that months use, but these letters stopped and so did my service (ie i couldn't log in), so naturally I thought the contract had run out and so I didn't renew it as I had access to another internet service in my house. I hadn't had a single monthly bill or phone call from them until now. Can they do this? as at the time I don't remember or have any record of cancelling but not renewing or continuing either, but yet again I've had no contact from them in around 2 years. I also like to state that even if the service they provided was available at the time I had no idea and never logged in to use it and cant understand why a ISP would let a running service go on this long unpaid without even billing me for 2 years or sending a account in arrears letter ect. Any advise would be great.