Godrej India - Harrassment by service centre during warrantee period

sir,
I had purchased Godrej refrigerator for Rs14500/ on 29.6.2009 from Next retail shop Ferozpur Road Ludhiana.Just after ten days of its purchase it had sound problem which was informed to service station of Godrej co. model gram Ldh. They sent Mr.Sunil twice but he could not identify the problem.Therafter one another person was sent he also did not provide satisfactory work.Thus one year expired and another person came he said gas needs to be filled and asked for money for filling gas and that to with gurantee of three months only. It means New Godrej refrigerator needs to be filled with gas after every three months.This delay has occured due to no service being provided by service station and they just lingered the things and warranty period expired.I was harrassed unnecessary .I want that the replace the refrigerator immediately and corect piece to be provided as it is not athentic to get the gas filled in New refrigerator after every three months.so I am writing you so that you ask service station people and we should able to get correct piece of refrigerator.
I shall be very much thankful to you if justice is being done here.Please do reply me.
Thank you
amita bhagat
D/o Sh.Chander Bhagat
B34/742 Habowal Kalan
Ludhiana Punjab 9463044558