In the picture, there is no way all the cap and metal come undone like that through shipping. These lens caps are extremely difficult to remove and are sealed tight. You opened them? Or did someone in transit open them? Pic is not representative of damage done 'in shipping' if so.

The real damage is crack on bottom of the left lens right? Did the liquid spill out?

Anyway I purchase these types of lenses too - not the shop specifically but they are usually shipped like that. Pos Ekspres, wrapped in newspaper but no damage.

The seller should refund you at least for that one damaged lens. Maybe it would be better if you didn't open them. Good luck.