Samsung — my mobile problem

Address:

Chennai, Tamil Nadu

I purchased samsung s5 mobile on 15/18/2014 (Rs-42500). But it occured some problem (Speaker problem ). So i gave this mobile to samsung service center at valluvar kottam on 05/12/2014. After solving that problem my mobile looks different they were changed some fare parts without my knoweldge .So take necessary acton. I was fully disappointed.