REPAIRS ON SAMSUNG GALAXY TAB 3 10.1

I have booked my device the second time around ..its a Samsung tab 3 10.1 . I took this contract at the end of July 2014 . It came to your`ll in October 2014 for repairs cause its not coming on and its not charging. Samsung repaired it and sent it to me . I AM HAVING THE SAME PROBLEM AGAIN AND I BOOKED IT IN ONCE MORE . I SPOKE TO THE LADY and she said if it is the battery problem . I will have to pay...R 1034.00 WHY. why should I ,if your`ll did not pick it up the first time around. I want a new tab. . I am tired of coming back and forth . I use it for business purposes and twice my data has been lost. My reference number is PRE167505 . Can someone help me. I`m am so tired ..I just want to enjoy my device