Freeserve
dumped my account last week as well.
I was connecting through a different ISP but found I could not retreive my account. When I spoke to them they shrugged and apologised.
Careful FS users, I know of someone else who used to access their FS mail, but used a different (cheaper) ISP. Apparently they do cancel accounts that have not connected through the FS ISP for a certain length of time. This is what could have happened here..