Samsung Split Ac 1. 5 Ton (3 Star Rated) — Not working of A.C.

Address:

Ahmedabad, Gujarat

A.C. Purchase on 24th March-2010, Complain for cooling , get repaired by company(Change of GAS) with remarks fitting was not done properly. Machine was kepr unuse and pur in use in March-2011 the same complain fore cooling, company has repaired by refilling the "GAS" with remarks fitting was not done properly. The season was over and put machine again unuse. In this march-12 machine was put in use , here same complain for cooling , Company has given same reason for reffilling "GAS" which is chrgable, on request as frequency of "GAS" leackage for detail checking of A.C. technician has reported that the inner Unit Coil is Faulty i.e. leackage of coil, require replacement with charges. I have requested to company to replace the entire unit as it is faulty from the initial purchasing. company has refused to change and charges will be levied as the period of guarantee is over.
Kindly guide how to proceed further in the matter.