How hard did you thrash the thing? Those things can take a fair beating, but they're no way as hardy as the cube. Mine pops a lot.
You can buy replacement strings at several sites. Some also sell replacement tiles. Unfortunately, as admin, I can't directly recommend a competitor. You'll have to google.
I can, however, point you at a magic restringing guide that might help:http://www.youtube.com/watch?v=0PJpxiP_uE4
Please take off topic discussion off this forum. Thanks.