I had to provide the username, the birthday on the account, and the original email – I don’t recall what else. But here’s the general info & you can use the “create a ticket” button at the bottom.
https://classic.support.neopets.com/hc/en-us/categories/17732911148045
Haha yeah it’s pretty nuts. There are some great neopets write-ups on r/hobbydrama. Plus my favourite Jellyneo article of all time: https://www.jellyneo.net/?go=comments&post=14373