Wireless pairing and fuel light,no sound

Hi i bought a pair of beats studio2,put them on charge all white lights on when they fully chargrd and unplugged i switch on , the lights go out,they dont stay lit, should they stay on. Then i , pressed to pair then , nothing , no blue light nothing is picking the beats up wireless, ive tried galaxy s10, phone, samsung tablet, my sons iPhone, nothing , so i followed the instructions and reset them, tried again no lights stay on nothing pairing no blue light for bluetooth, so i plug the jack in i get music through the left ear if plugged wired, the seller saying they worked perfect when she posted them, but they was total flat when i had them the next day, are they broke,or fixable if i update, she said she hadnt used them this year, then she backtracks to say worked fine just before posting them monday, any advice, before i go back to here to return for refund please anyone any advice please