Hi, my husband has a U visa approved from US with 797C attached i94. He is in india waiting to get his stamping done. He also had to get a waiver aporoval to reenter the US. Waiver has a validity. He is unable to get any appt for months he is trying . Is there any other way. Will a dropbox work . Customer service has same reply to book online appointment. What do we do. What if no appt shows up and his waiver expires. How to get this done. No slots opening.