If you are in Europe and this happens to you, the GDPR gives you at least a partial solution: they don't have to give you your account back, but at least they have to provide you access to a backup of your data.
NOYB has a list of what your rights are [1] and "My Data Done Right" [2] provides a handy tool for finding out who to contact and how.
NOYB has a list of what your rights are [1] and "My Data Done Right" [2] provides a handy tool for finding out who to contact and how.
[1] https://noyb.eu/en/exercise-your-rights
[2] https://www.mydatadoneright.eu/