How long are characters saved/stored?

[kega2k7]

I had signed up and even donated a few years back (sometime in 2011 I think) to this but it appears I know longer have a valid account with the email address I signed up with.

Does anyone know how long they are stored for? I had around a lvl 12-14 iksar necro camped in the karanas doing aviaks. I think he was around that level anyway. He couldn't take the top-end birds that much I do recall. I'd like to recover him if it's possible.

Is my account pretty much gone though? Thanks in advance.