Onida Split 1.5ton — not working since last 10 days

Dear sir,

I had bought a 1.5 ton ac onida split ac MODEL s[protected]from rathna cools pvt ltd vide invoice no 5342 dated 30.04.2009 and after chasing the company installation team several times then the team installed my ac on 04.05.2009 5.pm .the ac was wrongly installed resulting not cooled properly, after severel complaints and phone calls, THEY WILL NOT RESPONSE AND saying our service person will come before 5 pm on everyday .it is huge amount of waste which pours out of the a/c during the summer seasson .
hence my request you to please attend it someone rectify my AC or else replace it with a new a/c