[infinite_mybb_import20408]

That email looks fishy af .. if it was from IG it would be support@instagram.com not something@support.instagram.com   ... somebody probably owns the domain support.instagram.com and trying to phish for your ID.

DO NOT SEND THE PIC.

Contact IG via their legit contact info found on their website, you may be able to get the account back.

That's not possible! Domains do not simply work that way. You cannot have a '.' in the domain itself; however if you own the domain it is possible to give the url a subdomain which looks like this: 'support.instagram.com'. This can only be done by Instagram and no one else!