Samsung — excess heating problem

Address:

Dharwad, Karnataka

I was facing the problem of excess heat from 1 month then gave the mobile to Samsung service centre of hubli which is in Karnatak. After some days they gave back but still problem was there again I gave and on 2-5-2015 I received back but still problem is there they have not given any solution to my cell the cell is under warranty so I'm fed off by the service how can I repair my cell please give solution . I am using Samsung galaxy s5 mobile.