This is Scientology, and they won't stop calling, although I've registered with the national do-not-call list and reported them previously. Please report them at the link jaylo listed above!
I got over a dozen calls from these fools in 2 days. It is the psycho trolls at scientology, who do not know how to take no for an answer. They are incredibly annoying, and can bother you for years at a time. How this is legal for them to do, I don't understand.
It's not legal, everything ( well almost) this criminal organization does is ILLEGAL!! Complain to the BBB..who knows, it might help. 'Church"..indeed!