Lumia Charging problem

[emi539]

Hi i got lumia 620 for like 6 months everything goes okay but suddenly today when i was trying to unlock my phone nothing happend , yesterday i had like 30% battery so i thought that i would need to charge it while i putted the cable nothing happend still black . Also removed and putted again the battery and still same thing. Tried to hard/soft reset and the phone doesnt vibrates
What should i do ?
PS.I know i posted it yesterday but still today does the same thing and its not working while i let it in charge