You need the services of someone who can get the name and address of the phone number holder. I had a claim off someone, I had the name and email address. I emailed the claim and radio silence,
I then found out the address, full name and emailed a legal looking request for payment, with the note copied as an admission of guilt. Deadline of 3 days to cough up or i was going legal.
She did. Tips to find out more details…social media, Google phone number, Google name, local camera footage, I quite enjoyed the search took me about 1 hour tops to find her.
Good luck