My tab WONT TURN ON need help

so i was using my LTE samsung galaxy tab 4 7.0 this after noon its like brand new I've had it since october mid way trough so its less than two months and i pressed the button for the screen to go dark not off just to sleep and feel asleep i woke up about an hour later and it wouldnt turn on it was at 50% so it was fine for the rest of the day and i only had 2 applications running which is not a lot compared to what i normal have, like they weren't open they were just there in the back round and now it wont turn on and I'm using it as my phone so i don't have a phone now ether i don't know what to do I've tried pressing all the buttons and holding them down i plugged it in to the charger and it didn't even show that it was plugged in its not over heated and when i plug it in it doesn't over heat what should i do if it doesn't work in the next couple of days it will go back to the store where i brought it from but its in singapore so I'm trying every thing i can to fix it here so it doesn't have to make that trip :/