Carrier Airconditioning & Refrigeration Limited — Poor performance of 1.5 ton window ac

I had purchased one carrier brand window ac 1.5 ton genx range in march' 2007 from a kolkata (India) dealer. Since day 1 the machine could not give the cooling less than 23 degree. During may’9 and jun’09 the cooling cut off had become 27 degree. The room area is about 140 sq ft.
Regarding this poor performance of the said ac, i have followed up with carrier india authorized service centre at kolkata and have also expressed my concern to the regional heads and the country head. This has been going on since 21st of june’09. But nothing has resulted as yet. Though i have sent mails to mr. Zubin irani, managing director, carrier india and to mr. Geraud darnis, president, carrier corporation, usa.
The ac capacity calculator provided in carrier website showed that an air conditioner of less than one ton is sufficient for my room. Now, carrier india has withdrawn from their website, the feature of “air conditioning capacity calculator” under the pretext of “page is under construction”. One of my critical complains is based on this webpage and i have mentioned about this in my mails to carrier india as well as carrier usa. This proves that a deliberate attempt has been made to conceal the fact that carrier india had actually misled many consumers like me.
My grievances are :
1: product related : the machine is not performing form the date purchase as
The cooling cut off was 23 degree and above.in the second year of the purchase it has gone up to 27 degree. The machine is only two-year old.
2: service related : reluctant approach of carrier india just to bury the issue and to humiliate a consumer.
3: false information : the air conditioning capacity calculator of your website suggests that for my kind of room the capacity requirement is not even one ton whereas the ac machine in question is having a capacity of 1.5 tons. Your own calculation certifies that i have purchased an over capacity machine. Still i am not getting the optimum performance.

Sandip chatterjee
Kolkata
India
Cell no. :[protected]