Consumer Redressal

I have bought a lenovo Vibe Z2 PRo from flipkart in November 2014. The product is still under warranty. The display for the phone has completely blacked out.I had approached nearest lenovo service center for the complain. They say that the phone has physical damage and hence it is not covered under warranty. They have given a quote of Rs. 13000/- for repairing the same. The oringianl price of the phone was Rs. 33000/- The phone comes with Metal body and gorilla glass. It does not have any scratch on crack on the screen. There is a small dent on left side of phone and the service center says that the phone has fallen down with the dent and hence the internal system of the phone has loose contacts. I have been repeatedly telling them that the phone was working fine with the dent and when the display went off it was not due to any fall. The service center at Dadar and service phone no. of Lenovo have both said that there is no other way out. Lenovo has ruined my Rs. 33000/-.