Need sugesstion. Help me out boys!

I manage 3 onlyfans models and this month has been good. I've opened a place and I have around 20 workers working for me, I give them accounts and they only chat.
So the model is local and I work only with USA traffic cause i don't want the model photos to be leaked here or something and I've blocked my country in onlyfans, my friend saw randomly an Instagram account with my models photo and it had around 5k following people of my country and was promoting some shit, im sure its one of my workers who i fired or whatever and want to do bad to me, now the idea is that I want to take down that account or find the IP i know it's hard but if you guys have any suggestion where to find somewhere to take it down pls reply

You should report it to Instagram.

https://help.instagram.com/370054663112398
You can file with the courts in your country and ask for an order to ask Instagram to reveal the details of the owner, but that's it. Other methods of getting the IP are sketchy and I don't know what you would do with that, doesn't sound like something legal...