if your main profile is completely dead, forget about opening support tickets because facebook will never talk to a ghost. sometimes people can still get it back through the back door, but the cost is extremely high. i once saw someone take an appeal for 1k2 $$$ around 2024. they said they would use an internal channel or support line to pull the account or fanpage back. unless that page is making you thousands of dollars every month, it is honestly better to just cut your losses and build a new one from scratch.