Hyundai Falsehood

I purchased a vehicle there a few years back and customer service was great. After following my service dates and warranty on time and reporting to them that the vehicle was pulling to the left they brushed it aside as nothing. I started noticing a trend of always having to have the steering rack. The last time the steering rack broke was in November last year. I took the vehicle to hyundai and they informed me my warranty was finished. Having a good relationship with them I believed them and proceeded to have the steering rack fixed out of my own pocket. After I found out from the mechanic that the vehicle looked like it had been in an accident before. Knowing I never had an accident, I realized they had sold me the vehicle knowing it had been in accident and not disclosing the fact then brushing my concerns aside. Besides all this, I had in fact paid for the extended warranty and had paid to fix the vehicle unnecessarily. When I confronted them they offered to replace the steering rack again, with no mention of the money I had spent or any Form of acknowledgement of there duplicity. I have spoken to many people to help but nobody seems able to. I truly do not know what to do anymore. What they have done is wrong and yet they could get away with it.