Tire Bead Problems of BMW 325

I was driving at 70mph on i71 with cruise control enabled when I felt vibrations for approx. 20 seconds and then my right rear tire blew out. I had driven approximately 30 miles up to this point and I verified that tire to be 36 psi as recently as that morning. The tire has no puncture damage and the bead is still fully set on both sides. The tire separated between the sidewall and tire face. Tire rack refused to resolve the situation in a way that I would not incur further out-of-pocket costs, and the tire manufacturer acted confused and failed to comprehend the information I was giving them. I ended up filing a visa chargeback against tire rack. I have this same tire on two cars and we've seen these tires fail on our other vehicle but I thought it was simply bad luck. This time I'm absolutely certain that this tire failed due to a manufacturing defect. The tire is still currently set on the wheel and has been untouched, and is available for inspection. The tire in question is a general altimax hp, it's not available in the NHTSA system.