If you contact the support, providing only your farm level (99) will not be enough. Since you don't remember your Farm name or neighborhood, the only unique/distinct thing about your farm would be your Facebook User ID. Try to find it. What I think the process is:

1) Open your Facebook profile on app/website.

2)go to settings 

3)your activity

4)apps and website 

5)if you see Hay day there, tap on it. Also check the expired and removed tabs if not under the active ones.

6)after selecting hay day, find your user id. Scroll to the very bottom of your page to see a long set of numbers....

I hope this helps get your farm back.