Consumer Redressal

I purchased an RT35 refrigerator on 23/03/2010 from Samsung. I lodged a complaint to their call center on 10/10/2013 for some problem with it (ref no. 8420141669). One engineer visited on 11/10/13 but the problem was not solved. The second visit was made on 16/10/13 and the compressor was detected to be faulty. As it was under warranty cover, the compressor was replaced on 17/10/13. I found that the model of the old compressor was MK 172K S1U and the replaced one is MSA 170K S1G. I was told by the attending engineer that this is a better compressor, that is why Samsung is giving 10 year warranty on compressor now. Unfortunately, I found from the Samsung website that the replaced compressor is inferior in efficiency compared to the original one. I think it is an unfair activity on the part of Samsung. I have talked with the customer care but instead of taking any action they tried to convince me that this is not a problem. I will be very happy if you can do something.