I’m no rocket surgeon.
There might be other reasons, but we as a society no longer answer phone calls unless our smart phone knows the person (even then it’s iffy)
I assume people in the law enforcement community get these calls too. Why can’t they do some sting operation? Answer the call, say yes I do want to extend my car warranty, here is my credit card number. Then follow the money.
I assume offshore accounts are involved, but this doesn’t seem insurmountable.