Tyre smokes

Two weeks ago l replaced wornout brake shoes for the rear wheels and never drove the car. Just recently, l drove the car for 20km and when l finally stopped there was a heavy smoke coming out of the left rear tyre. The wheel and the mag where very hot. I lifted that wheel up and discovered it was not turning, when l opened the drum for that particular wheel, the springs that hold everything together was loose and no longer in position and the brake fluid had already leaked(on both rear wheels), the brakes and the handbrake were no longer working, actually the entire braking system. Having drove the car for such a distance, do you think l might have damaged the bearings, to make matters worse it appears like there are some springs missing, l only saw three springs coming out of that drum-any idea of the number of springs from one drum as l'm struggling to get the brakeshoes into position