Hyundai Motor India — santro car gl model

sir I HAVE SANTRO XING GL MODEL UP-14 AU 5735.I HAVE SERVICE FROM YOUR DEALER IN NOIDA .NAME-DS HYUNDAI B-32 SECTOR-58 NOIDA ON 31/12/2014.THEY HAVE SPOIL MY CAR BACK BUMPER, THERE REPSENTATIVE WHO HAVE ATTEND MY CAR FOR SERVICE HAD BANG MY CAR FROM THE WALL ALL SCRATCHES HAVE COME THOUGH I HAVE SHOWN MY CAR TO THE MANAGER & COMPLAINT TO HIM THAT HE HAD SPOIL MY CAR BUMPER IT WAS NEW NO SCRATCHES WERE THERE EARLIER .BUT THERE IS NO RESPONSE .THEY SAID I AM SORRY.I HAD TOLD THEM TO REPLACE MY CAR BUMPER.BUT NO RESPONSE.THOUGH I WANT TO REPLACE MY CAR BUMPER.BECAUSE IT IS IN THERE SHOWROOM REPRESENTATIVE HAD SPOILE MY CAR.