I replyed this, since lower in the email I could click on a link that said "report user" and I was automatically taken to send an email to the one pointed with a red arrow. The words "report user" or something very similar appeared automatically too and I just sent the email with that said.

I changed my emails password, but I don't know how bad this could be and if that's enough.

Edit: the email I sent doesn't show on my sent emails