Don't fret. I want to have a conversation with your woman. Then your SHIELD organization will receive a call from me, on her phone. I assume they can track such communication to its source.
Then the choice will be yours. They will surely send men to arrest me, despite the fact that I will tell them Miss Foster awaits a most gruesome death if I do not tell you where to find her and how to save her. They will not care. They will imprison me again, and I will tell them nothing, and she will die.
Or you can beat them here, and do whatever necessary to delay their approach. You can come to this place, break the manacles you bound me with, and I will tell you everything you need to know to rescue her in time.
No need to worry, the clock is not ticking yet. That will begin when I make the call.