What to do
Change back quickly.
You changed your name and someone took the old one.
Short answer. Instagram says you can usually change back to a name you used before if nobody else has taken it and it has not recently been removed from an active account you do not own. If someone else now holds it, only impersonation, trademark or hacked-account reports apply.
Change back quickly.
Take this one part at a time.
Trademark registration number, office and class.
Take this one part at a time. None of it needs to be done in a rush.
Please do not send passwords, login codes, card numbers or access tokens.
Acctback is an independent service that helps people get back accounts on Instagram, Facebook, TikTok, Snapchat and Threads, plus Meta ad accounts and Business Manager. We also help with usernames, impersonation and agency work. Contact: WhatsApp +1 934 201 2490 or team@unbanz.com. Independent service. Not affiliated with Meta.
QUICK ANSWERS
Instagram has an inactive username policy, but it does not release names on request.
No. Only names with a real claim through the platform's own process.
Instagram says you can usually change back to a name you used before if no one else has taken it and it has not recently been removed from an active account you do not own. Changing back quickly gives you the best chance.
For trademark reports, yes. Without one, only impersonation or hacked-account routes apply.