Consumer Redressal

I have purchased a Samsung Inverter AC(model no.-SAC-AR12HV5NBWK) on 14/05/2014 from Samsung Plaza, E-Mall, 6, Chittaranjan avenue, Kol.-700072.(ph.no.-033-22128781). The installation was done on 16/05/2014.As per rule I had to purchase the copper pipe seperately for Rs.2520/-(12ft.)from the installer. But from the next day the spongy insulation cover of the copper pipe began to torn down exposing the pipe.While complained to the Showroom, they inspected admitting the cover is of low quality. But they are now claiming extra full charge and another tape-wrapping for extra cost of Rs.350/-.Now it,also, has been clear that the installer is not from Samsung authorised Service-centre.Now I am not getting support either from the Dealer or Service-centre. Please help me.