Honda - Element :: 2006 - Wheel Falls Off When Driving

My 2006 honda element was taken into a national tire and repair service that I use often . Told them to check my brakes for grinding sound. They concluded that the brakes were safe but could remove a rust or glazing for x dollars. I refused after they said again they were safe. 9 days and 400 miles later ( going to pick a cemetery plot for my dad ). I felt something funny on my front end .

(Out of nowhere ) at driving slow to make my appt . BANG, my front tire flies off across 4 lanes of traffic . Luckily I was nearly in front of a repair shop. They took it, I and told them to repair it and got a ride to my appt. The next day it was done for 400.00 .. It needed a new wheel because the holes were elongated and various parts . Upon returning to my initial repair shop to get a wheel alignment. They feel it could not be their fault when they removed my tires initially because of the 400 miles since they checked my brakes .