Samsung Mobile — Battery draining and mobile not working

Address:

Mumbai City, Maharashtra

I buyed Samsung S6 on 31st august 2015 from Sai Mobiles, charni road, mumbai, its been 15 days but from that 5 days mobile was been in the service station.. on 11th i sent to service station around 3pm and i was there till 5.30pm they told its been done, then same evening i again went there around 630pm with the same battery draining problem they told to keep mobile for observation. they gave me mobile on 14th evening around 7.20pm and lotd all is been resolved.. But today morning 15th Sept. again we are facing same issues of battery drainage after 100% battery charged, which i lost around 68% without downloading even single software within 4 hrs time and even in this 4 hrs i hardly spoked with anyone for even 10 minutes.. this is how Samsung India treats customers???? I am paying so much high cost for buying a product for Rs.37500??? Service station (SHARP ENTERPRISES, LAMIGNTON ROAD, MUMBAI) giving only 1 answer we have done it and fix mobile issues, and kept mobile for 4 days that is from 11th to 14th evening. this is ridiculous service from the service station and also from their senior manager Mr. Krishna?? this is how we are treated after sales of products?? they saying they have changed the battery and even mother board of just 10 days old mobile, then also the same issues arise??? then what have they done in past 4 days?? think if i having a busy day and there are many calls on mobile then even battery will not last for 3 hrs???? Even there customer care executives not ready to listen from past 4 days its like we have given the query to Escalation team, but till now nothing is resolved.. when i told them its defect of mobile, then they giving excuse like its 7 days are passed, we cannot do anything.. We request you to kindly give us the refund of the mobile phone or replace the Samsung s6 with the new piece at the earliest.. i am really FED UP now... hope for the best reply from your side..