Durian Industries — Glass top steel dining table

Address:

Allahabad, Uttar Pradesh, 211001

I have purchased dining table from durian outlet elgin road 3 to 4years ago.from the very first day it was having a manufacturing defect as the glass sheet hanged under the glass top was loose.on complaining they said for this type of fusion fault the company is providing the service free of cost and theysend the mechanic and repaired it after 2 or 3 month the hanged glass sheet fall down and the all four fusion points were defused (opened). the company again send the mechanic and all the four points were fused .
but now this time after one months of regular complaint they send the mechanic.
the mechanic as well as the company outlet manager was demanding money for the repairing for the same type of defect for rs.500 to600 per fusion point .and still they are not sending the mechanic..
kindly advise what should i do??