Is there anyone from Instagram who can claim an inactive IG username?

Hello, is there anyone trusted who can help us claiming an inactive, banned, or deleted IG account?

We want one username when I try to register an account with it. Instagram says it is unavailable.

When I search for the account it looks. It doesn’t exist.

You will need to file a complain. That is the only way to retrieve account if it’s disabled:

So this is not your account, you would just like to get this username for yourself, but you are not able to use it? This account is probably in some kind of temporary lock or needs some kind of verification if it’s not being shown when you search for it.

Yes, exactly. We want the username for our business.