Stolen iPad - I Locked. But Not Done!

hello guys.

About a month ago I got my iPad mini 4 Stolen as well as my mother's iPhone 6s.

I had 2 different Apple IDs signed in the devices.

Of course I used findmyiphone and got my devices locked.

BUT

Since that day, i started getting EMAILS and SMS from a unknown source (Faking "apple") that asks me to sign in to some website that looks exactly like findmyiphone / icloud - but its pretty obvious its FISHING.

I've also got a mail said my Apple ID was blocked (probably because the thief is trying to unlock the devices and guess my password) like 3 times.

Is there anything i can do to stop this?

I already blocked 3 different EMAIL addresses and 2 different phone numbers.

and

is anyone else familiar with these type of services? like paying someone to impersonates to apple services? its looks like a job someone with a knowledge will do..

thanks a lot.