hi please try to charge it with the phone switched off what it will do if you charge
it with the stock charger and cable that was delivered with your phone,
if that doesnt help then try another (good quality) short length strong usb cable
with the stock charger or with another usb adapter 500-1000-1500mah
(high capacity adapter might charge faster) is all fine
as long as you keep the charger below the total capacity of the battery itself (max 1830 mah)
if you tried all these options and still doesnt work then you need to return the phone
to the seller
it with the stock charger and cable that was delivered with your phone,
if that doesnt help then try another (good quality) short length strong usb cable
with the stock charger or with another usb adapter 500-1000-1500mah
(high capacity adapter might charge faster) is all fine
as long as you keep the charger below the total capacity of the battery itself (max 1830 mah)
if you tried all these options and still doesnt work then you need to return the phone
to the seller