Most think that they can get 'free' numbers and use that for verification purpose. But even with paid service 99% you cant complete verification of any signup. Because the numbers are already tagged as "virtual / DID " numbers by providers.
The whole purpose of phone verification is to validate the actual address of the customer and some spam and scammers think they can override using 'free DID' .. what a shame of usage of technology.
Many try to register to some of the online portal with fake address or number. Or simply show that they have USA phone number so any one in USA can reach that number and call can be forwarded (without the caller knowing) to anywhere.
if it would easy to find then every one do the same, spammer please stay away from this..... you need to make contact form on live chat or pop-up in landing page to get the contact detail and then you can approach to that client.
Don't worry I have had the same problem with paypal use TextNow it's a free service where you can get virtual US number for paypal verification. Let me know any other thing if I could help you with ?
Attention: "role based name" email prefixes such as support, webmaster, info, contact, forum, service, affiliate, admin, traffic, partners, marketing, etc., for our member accounts are not permitted. They are acceptable for a vendor listing, but not for the member email. This is due to bulk email processors scrubbing them for delivery due to extremely high bounce rates. Please apply for membership using a personalized email prefix. Something like email@example.com.
If we discover you signed up with a role based name we will give you only one message to change it. After 3 days your account will be removed if the email is not changed.