Did the provider understand the request was from DOBMERB/ METS? I would think the folks contracted would know some applicants would be under 18. Maybe have them call back and ask to speak to the office manager
The plebe to be can write out some cards ahead of time to mail to the sib. They will have more time at home now than during the down time of plebe summer. They can leave space to add a line about the chow they are eating or something special like the fireworks on the fourth but the heavy lift...
If u have an LOA and are waiting for a waiver after the 15th you still have a conditional offer. If cleared from the waiver u will get a full offer. We went until mid May last year.