2010 AUDI A3 Tires Problems

225/45zr1794w purchased at discount tire. TPMS system failed after tire installation. I told the technician and he reset the system. Five miles later TPMS indicator came on. Malfunction TPMS. I monitor the tire pressure periodically and the tires seemed fine. While driving on Florida 528 to the airport i heard a rumbling and pulled over immediately. The tire sidewall was cut almost all the way around the tire. I assume from low pressure or tire malfunction. The tire is only a few months old. I am going to visit discount tire today and see what they say/do. I commute 150 miles a day at highway speeds. Fortunately I was able to pull over and not damage my rim. I removed the tire and put the spare on. I was flying to Columbia south America and nearly missed my flight. I have not found any reason the tire lost air pressure....

TL*THE CONTACT OWNS A 2010 AUDI A3 EQUIPPED WITH BRIDGESTONE POTENZA TIRES, TIRE SIZE 225/14/18. WHILE DRIVING APPROXIMATELY 15 MPH APPROACHING A STOP SIGNAL, THE CONTACT OBSERVED THAT THE TIRE PRESSURE INDICATOR DISPLAYED A LOW PRESSURE READING. IMMEDIATELY, THE VEHICLE WAS DRIVEN TO THE SIDE OF THE ROAD. THE REAR DRIVER SIDE TIRE HAD SLIGHTLY FLATTENED; AND REPLACED WITH THE SPARE TIRE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THEY REFERRED HIM TO A TIRE CENTER FOR THE TIRE DIAGNOSIS. THE TIRE CENTER INFORMED THAT THE TIRE SHREDDED FROM THE TIRE RIM. ALSO, THE OTHER THREE TIRES WERE NOT ROAD WORTHY AND THE SIDEWALL HAD BUBBLES. THE VEHICLE WAS INOPERABLE. THE CONTACT STATED THE DEFECT WAS NOT COVERED UNDER THE WARRANTY. THE FAILURE MILEAGE WAS 9,600. THE DOT NUMBER WAS EJT70CCJ3109.