Today Instagram announced a new account review process. Now if Instagram wants to block an account, it will initially warn a user about this. But users can request a review of their accounts.
All you need to do is to fill in the form (like on the screenshot below) and enter your full name (not an Instagram username), your email and explain why you think Instagram is wrong.
After, Instagram reviews an account and either restores it or completely blocks.
Another novelty Instagram is going to implement is two new sections you will soon be able to find in your account settings: Reports and Violations. In these sections, you can track your own reports and see why people report your account.
These features will highly likely appear in every Instagram account during February.