Put the stock springs back on and take it in for warrenty replacement, in theory you either did something wrong during spring install or the struts were bad from the factory. The call is on you, I would take it in for warrenty and replace then put the lowering springs back on making sure I did it properly this time. If it fails again then it is the spring and the spring company should be responsible. Just my opinion.
Sorry to hear about your misfortune thought, seems like something that would happen to me.
Colby
How do you screw up a spring install? They only go in one way. :lol1: