hyndai problem

<p>I bought new generation i20 2015 December and now  I'm experiencing a problem with shock,I even took it to the machine for shocks evaluation and they said I need to replace all 4 shocks and my car is still under warranty. I had took it twice to hyndai bt they don't want to change it,the keep on saying the shocks are okay bt even If I drive it or I ask someone else to test it, we feel that there's something wrong.</p>