Don't change your number because of them. Make their scam be known and contact the DNC registery and the information that another has posted above. Make it hard for them to continue as they will get someone that is nieve and need others to watch out for them.
I got a call from this number today saying there was a criminal lawsuit in which I had been named in. First of all lawsuits are civil and not criminal, first red flag. Second,and not to be offensive, but a guy named John Snyder more than likely wouldn't have a middle eastern accent. Third even if there was a any type of lawsuit filed you are served either by certified mail or in person from a Sheriff's Deputy. This is a total scam, and they are not even smart about. Just don't answer or if you do tell them to get bent.
They keep calling me from this number saying they are fron the division of criminal investigation. Different names, none of which I can undrstand. I asked for something in writing and they threatened me
You're probably talking to an Indian or Pakistani fraudster. They're powerless. They talk big...that's it. If he threatens you just tell him to take his little unit out & try to scare a soggy Cheerio with it. They might become a nuisance. Even at work. Ignore him. He'll go away as soon as he figures out there's no money to be had.
Live Well.
Gunnar