First off, thank goodness you were not injured. That is just about as close to a very serious disaster as any of us want to come. The gun's redundant safety features worked as they are supposed to and held it together even though part of the bolt had failed.
Second -- Take a deep breath and get your head together. Start collecting everything that's relevant, take lots of pics, make copies of any documentation about the gun and the ammo. Then call the manufacturers of both. Be prepared to have to work through their customer service systems a bit, which can be frustrating, but having a blown up gun should get you some expedited service! Record, or at least take notes of, every conversation. Who you spoke with, date, time, and what they said (promised, offered).
Be as polite, calm, and clear as you're able, but be firm that you were almost very seriously injured and you want them to make this right. They will!
I'd be very surprised if this was an ammo issue. As others said, looks like failure of the bolt's locking lugs, and the fact that they held on for just a few rounds indicates that there was a manufacturing problem. That does happen, and that's why companies have warranties. Yours isn't the first blown up gun they've ever seen, and they replace guns for a lot less severe problems than that.
Good luck and keep us posted!