These guys are a particularly nasty group from Kolkata in India. They run a refund scam and this video shows what their call center looks like, how they operate, who and where they are. I've sent a link to the unblurred version of this video to the Kolkata Cyber Police (for all the good that it will do).
Want some more? Check out this satisfying clip
of a scammer in sheer panic after he realizes his identity has been exposed.