HP Laptop 1104TU — After purchase of 1 months 15 days the lcd is crack from lower side

I have deposited the Laptop to the HP service centre in kolkata, loudan street. They refuse to change the LCD and ask for Rs27589/- for change of LCD of Laptop. They regect to change on the ground that the lcd is broken. When I ask for Technical Evaluation report that the crack is physical damage or not they cant provide the report. The LCD is Crack but from the top no liquid is come out and the laptopis working properly only a scrach is coming on the lower portion. Now suggest me the measure to change the LCD of my laptop.