What's mean new unit?? A Replace?? or A repair?? Seller said "blackview doesn't support replace new phone service." and seller said "only repair" Okey.. repair.... But, seller persists "you need to pay for repair." Is it right?? Has buyer to pay for flawed unit? for rep...

Hi.. I have some problem. I bought a bv9500 3month ago. I don't droped this phone to ground and i don't droped that into the water.  But, currently i'm suffered by my phone. because my phone has some problem. 1. battery is crazy. battery of bv9500 has energy of 50-70%. but phone is being shuted down...