Gionee Communication Equipment — battery not working

The F103pro model battery is not working properly.the phone is shutting down as soon as I switch it on and even after showing 26 percent charged the phone switched off as soon as it was switched on.the battery is charging abruptly either too fast or too slow.but the phone is switching off as soon as it is turned on.I showed it at the customer care centre but even after changing the battery the issue is persisting.
Are there no original batteries of this model available as I found none at your customer care centre.