Understanding How ESOPs work

So i was allotted x numbers of Esops when i joined out of which y number of esops have been vested the price at the time of my joining was 40USD/unit and now the buyback option has been offered to us at 30USD per unit. I can sell 30% of y units vested. I am at a loss of 10USD per unit given my allotted units stood at 40USD a unit. Will i get anything or not cause some folks in my company are saying that i will have to pay from my pocket as i am at a loss of 10$ per unit so i should not fill buyback form. Please help me understand and help me out.