Like the others here, I'm suspicious of the $210 you sent them as a "deposit", but you received a new radiator in return for it, so "technically" you bought another radiator from a dealer and haven't gotten a refund yet.
But, they said they would send a radiator if you sent $210, and they did. (Three times now...)
All in all it sounds like a shady deal on the end of the dealer, not Champion themselves.