You've tried every way to get your account back? Do you still have access to the original email and couldn't get a password reset? The fact that it hasn't been touched in over a year show that no one is actively using it as a main, and if you look at the account details and all the pets are still on there...I'd think you might be able to go through password reset or at least tickets to get your account back (especially if you have a lot of information pertaining to what is on the account).
I know the ticket system sucks and it takes forever, but if you can't find someone on here then you SHOULD be able to regain assuming you have access to the original email.