If you’re a European citizen, your instance is likely in violation of your right to be done forgotten, and you may want to point that out to an admin.
That said, if your instance doesn’t have any motive to respect European rules (i.e. if your instance provided your account for free, and so doesn’t have any money on the line), you may still be out of luck.
If you’re a citizen other places, you’re probably out of luck, until your home state adds better privacy laws.