Hero Motocorp — defected pre installed accessories

Address:

Hazaribagh, Jharkhand, 825301

Yesterday on 13/06/2018, i bought a Maestro edge and after i took it too my home, i notice that one of its bulb is not functioning, but when i took my scooty to showroom, they charge 20 rupees, for the replacement of that bulb, but when i asked to the manager he told you have to pay for that, because the is not free. so please explain me why do i pay for that defected parts which is pre installed in my scooty, if you not response to my complain in 24 hours, i had to go to consumer forum