SAMSUNG MOBILE INDIA NOT CHANGED MY BATTERIES

Sir I hav given two times of mobile to samsung care for display problem and draining of battery too fast wothout using but they changed my battery but not changed my battery so problem is same as before .No use of my mobile ..they told lie that changed my battery but in real same battery .
I hav complaint second time in this matter.Please sir I am in trouble .Samsung care giving very poor servicing and cheat with peoples.Please Do something about my matter, I will very happy thanks