Lose Power Steering problems of the 2008 Mercury Milan

Well, there have been lots of problems with my Mercury. On my trips to tennessee to care for my elderly parents, on a return trip from tennessee to florida, my car lost power steering and slowed to a crawl. I was able to manipulate my car to the side of the road where it was not overheating but would not increase in speed past 20 mph. I was able to take an exit and find an autoparts store and have the engine checked, the belt had come completely off without being broken. I had to have this replaced. I have experienced a total loss of coolant when the hose broke loose. Also, my problems with the wear and replacement of brake pads and rotors very, very frequently. This seems to be a major issue with this car. This morning, 12/8/2015, on my way to work the wrench light came on and I noticed my car jumping when slowing and changing to the lower gears and also upon accelerating, the jumping also occurred. I have contacted my mechanic and am awaiting a response.