I have to ask.

Have you ordered them recently?

If they are still in warranty go back to Bitmain, start the ticket for the whole order and put them to pay to have them back and serviced at their expense...

Also, go on their Facebook and Twitter, even LinkedIn if they have if they do not help out as this is inadmissible.

No one should get used gear, let me correct that. If you get used gear it has to be within certain standards.
I haven't dealt with used gear as much as other members in this community, but I have never, yet, seen a falling radiator...

Again, really sorry to hear this has happened to you and hope you get through it