I see a lot of people paying for Instagram ban service which is annoying its public and known method for long time
You need good proxies and Instagram accounts
you can go and crack thousand of accounts using open bullet config
or you can use account creation tools
if you search for Instagram configs in the Pretesting configs Section you will find a lot of good configs
After you get the accounts go ahead and use one of these Mass report tools
and report the account you want to ban
just make sure you have BIG NUMBER OF ACCOUNTS
Also, you can go and try Account Creator tools
like this one
Tools Credit: GitHub
Enjoy!