Very unreliable car!

This is the thrid time in three years that the TATA Zest Diesel Automatic has broken down. First time, there was a leaking gasket. Second time, the gear electronics went haywire. Third, the engine stopped while the car was running. Right now, its at the service centre, and I'm waiting to see what the problem is this time. Although, its a decent car, it is completely unreliable. I have made a mistake buying a TATA car. :(