Default [Q] Urgent Help Needed

Today I have faced a big problem on Xperia C. When my phone showed 16% charge remaining, then i switched off the phone & plugged it in charging. After 2 hour when i tried to switch on, it didn't open. Still when i plug in charging the phone, it indicates charging light. But phone can'r run or open. Nothing is happening when i press power switch, even not vibration. Plz help me what can i do for solving this?