Gionee Communication Equipment — volume of the phone

I am using A1, it has awfully low volume. Both on the speaker and while on a call. It's so low that I can't hear anything. While playing any kinds of audio in any format, the volume of the audio remains very low that its negligible. Also, the headphone jack is not working, it doesn't read earphones with 3.5 mm pin, so even if I try to take a call on a earphone, it doesn't let me. There is no possible way to talk on the phone, it's very annoying. The phone is defeating the main purpose of being a phone.