Bad Service Experience

I have had my i20 for less than 2 months and have broken down 3 times now with the same problem. First time I broke down I had the car for 3 days. It got "fixed" Second time broke down with the same problem, the clutch gets jammed/hard and you can't push it in. This time they couldn't find a problem with the car!! So I had to fetch my car and trust that there was no issue. Until I broke down again yesterday!! And now my car has to go back to the same people that told me there's nothing wrong with my car.