2018 MINI COOPER Tires Problems

Tire size 205/45 r17 pirelli ginturato We were driving from an appt and the low tire air light came on. We got to car x and found the side wall and tread belt on the inside of the tire had came off. Car x didn't have a replacement tire and they switched the bad tire to the back so we would have xontrol of the steering in a blow out they said to go across the street to Goodyear but be careful. Goodyear had to good get a tire because the car was considered unsafe and a road hazard to drive on the road or highway. We were over an hour from home. The other 3 tires are doing the same thing.we don't have the tire but we do have pictures. Our car could have cause a big accident if we hadn't thought quick enough and the mechanic hadn't found...