i have bought GABA NATIONAL 1 ton split ac..pipe jo 10 feet company deti hai us k sath maine ek aur 10 feet ka pipe join kara hai now its length is 20 feet but the a.c is not cooling the room properly.what should i do now...also tell me gaba national kaisi company hai kyun k mjhe kisi ne kaha tha gaba national gree haier pel lg orient se best company hai...