So Purdue admitted you and actually offered you some FA? Can you breakdown the award you did get? I am surprised you got ANY FA offer. Did you apply with your international residential address? Did you run the NPC correctly? The COA isn’t 30K for a non resident. It is over 40K
Go to school in India. Do you have eng tech courses in India? You applied for engineering at other schools. You are clear that eng tech is not an engineering degree?