Sorry but based on your accounts, it is a valid trade. You made a mistake and lost...someone made a huge profit out of it.
It is an expensive lesson but not a total loss. It will take time to recover but you can re-build your portfolio with the 10% left. Good luck!
A asset listed on 4.5$ in other exchanges ia traded at 50$ by exchange and it ia my mistake how.
Obviously i will trust exchange to provide market rate