Hey, it's not like it's the traders fault, he/she should make up for this, because it wasn't his fault in the first place, and not his fault for buying it at a low price, or let's say at a glitched price, it's probably a bug from the exchange, but again, the exchange should make a compensation for this, not only to bring the bought BTC back but to at least give something to the trader when it is not his fault in the first place.
Although, since PDAX has made changes to his/her account, he has probably no choice but to give it back, either give it back or demand something or give a condition to the exchange for having him return what he bought, again, it's not his fault in the first place.
If it is not his fault then that person shouldn't make up for it, making up for something that isn't your fault is a paradox of itself. The person shouldn't just get the bitcoin back but they also have to compensate the person because they try to blame the person for their mistake. If I were in that position, I would stand my ground because I know that I didn't do anything wrong.
