ULPT Request: phone stolen and taken out of the country, insurance, how do i block the phone?

Niece friend stole phone and took it out of the country. she erased the phone and used her icloud information so i cant have it locked.

I reported the phone to Verizon but i am not sure what else to do.

I did not get insurance for this phone.

I have a police report.

Any ideas? on how to lock or what else I can do with Verizon?

i had to suspend services to avoid international charges and they did but im stuck with paying the device