I’ve personally used this method to unban/reactivated 20-40 @‘s of mine. I would recommend starting with 1-3 emails, and if they all get declined, start making more and submitting requests.

Step One: Create 10 - 30 different gmail accounts (this is the amount of times you will be able to appeal per day)

Step Two: Switch to a private browsing window every time you do a new appeal so you cannot be cookied, and blocked from using the link

Go to this link:
https://help.instagram.com/contact/1652567838289083

Step Three: You need to use this link multiple times plugging in the different emails you created (the email on the account does not matter)

Step Four: Depending on the type of account you selected (business or personal) you will start to receive emails from Facebook with instructions. If its a business account you reply to their email with a business license, if its a personal account you reply with a picture of yourself holding a piece of paper with the code they provide

Step Five: Repeat this process everyday until your account reactivates (the emails you create will burn out after 10 days, meaning you will need to make all new ones)