Xperia M4 Acqua wont turn on. Help urgent

[LilyDi]

My Xperia M4 Acqua won't turn on at all, and there is a red light always  on. Charging for around 5-6 hours and it doesn´t work.  I tried using Power button + Volume up, but only the Red light shows up.  I tried connecting it in the notebook and it doesnt detect it. What can I do? Should it be the battery? Can´t work without a cellphone. Help urgently. Thank you. 

[LilyDi]

Hi everybody, I´ve just posted that my cel went off... wouln´t turn on. Charged it for 4-5 hours, took the cards off, pressed on button+vol counting to 10, and the red light went off. Pushed the start button and it started again. Thanks God for having a way to contact people again. 

[Qatrium]

@LilyDi

Glad to hear about that