I see/saw the respond to message box, but I click and nothing appears.
This happened at the end of last season as well, but I thought it was just because I didn't have an opportunity to get onto the site soon enough after the end of the season.
The fast fix is just to release anyone w a team opt you dont want picked up. You wont owe anything releasing team options, and it would warn you before release if it did cost money
The other option, which keeps them off fa market until free agency as well as allow you to offer arb to any type a or bs is to send me exact players you want options declined and exercised on. Pm me whichever yoh choose