Cellphone hacked by instagram?

I wrote on Instagram yesterday with a person… This one. Person wanted me to have a fortnite account, I told him I would not do that. Then he reset my cell phone to factory settings (I don't know how it could be done). He blackmailed me and told me to send PayPal and credit card or he would do it again and again. Does anyone know how I can protect myself against it and how I could possibly repay it

Go to the police

In any case, police and not blackmail! Otherwise, he keeps coming back. My Instagram account would also be private and blocked and all passwords changed. But definitely to the police!

If you have registered via his email address, he can even lock your cell phone so you can no longer enter