Hyundai Motor India — I10 EPS problem

Address:

Ahmedabad, Gujarat

Morning put the car in ok condition, evening start it. Suddenly steering starts rotating automatically two times and found EPS error, getting hard to steer. My car is just 15000 Km running in 3 year 3 months. Hyundai is selling defective products, just fooling people. Its a gross manufacturing defect and service center people cannot able to trace the problem with their electronic kit. They take it for servicing. I have to pay the paid service Rs. 3500, although car mileage and other conditions are good. After few hour they told me, you have to replace the EPS, which costs around 15-20K.
What to do??? what is the procedure to lodge a complain against Hyundai.. or how to get the work done...
J Mishra.