If you want to have any chance at redemption, you will release those people and drag your ass to the Inner Phalanx chambers right now.
Do not think about running away or doing anything funny, your rank is temporarily revoked and your ID card will not work on any security checkpoints. The Andraste is to be impounded, either willingly or by force. Meditate and reflect upon your actions, think about what you're doing.
The transmission was futile. All communication to the Andraste had effectively been cut off, including use of the bridge's communications station. The connection both Keepers shared was flooded with an overwhelming amount of frightened, confused, enraged and apathetic emotions instead. It was obvious Leviathan either had no intention of communicating, or lost the ability to reason.
The transmission instead returned null response, and wasn't received.