I just got myself out of the loop today. Here is how I did it, it is actually not very complicated and much more easier then the earlier attempts via proxy.
- I signed in to a different account
- Then I went to Settings: Log in to an existing account or add acount (my IG is not in English but I think it’s one of those)
- Then I entered my account name (the one that is stuck in the loop)
- NOW: of course I know my password, but to protect me, Instagram wants me to pretend I don’t know.
so I press: Forgot Password
then on: “need further help” or “further help” (again I don’t know exactly due to the fact my IG is in German) its at the bottom
then my email came, I confirmed it, with a code sent to me
then my cell phone number confirmed, with a code sent to me via SMS
then enter a new password
see if the given data is correct.
And boom… got your original account back. Worked for me. I only created this account on this forum to share this with you guys. I hope I could help you. Have a great Day 