It's highly unlikely that your character would have just disappeared and if you deleted it there is no way to recover it.

The mounts and what not, as was stated would have carried over if you had them in v1, and some items you needed to have had paid the version 1 sub for a few months to get and those months had to be before a certain time. The sub was only there for a few months so if you didn't pay for enough time you wouldn't get the items either.

Have you checked your mogmail in game? Most things are sent to you again there, they would not just be in your inventory, including mounts.