Consumer Redressal

I own a Carrier Windows A/C, purchased around an year back. I am also getting it regularly serviced but despite that the A/C starts blowing hot air as soon as the compressor is turned off in accordance with the regular on/off interval of A/C. I have registered two complaints with the Carrier customer care but they have paid no heed to it.In this weather it is excruciating to bear an A/C that blows off hot wind. I hope that with the support of this forum I would be able to get me complaint properly registered and solved in a time bound manner.