That looks mostly dead.
Try for a refund.
I have some Java Moss that was removed from my tank and put in a vase which I forgot outside and overnght temps were freezing for a few days. There were a few dots of green and it is mostly dead and looks like that, but any of the green live pieces can grow. It is still in the vase a couple months later and there are a few more very small parts of green coming along.
Probable not worth the time to grow from that small amount. Though you could try bright window not too much direct sun at first perhaps, it might need to get used to brighter and brighter light.