front brakes & rotors

What is your question?

i recently had my front brakes and rotors replaced. the mechanic "forgot" to reinstall the hub centering rings on my car. this error wasnt found until about two months later. long story short the rotor on the driver side of the car has both side to side movement and front to back movement. the passenger side is solid. what might the problem be and how can i fix it? the mechanic says im past the warrenty period for the repair so any problems i have to pay for.