How to get female crew I failed to claim

I recently completed a mission which offered a female crew as a reward, and the popup came up to recruit, or cancel. I was doing something else so I cancelled, expecting to be able to recruit her later (and take my time deciding which nation etc.).

Now I can't find out how to go and recruit her. WoT forums have been no help. What's the process for claiming her?

1. Enter the Campaign screen (below the "Battle!" button).
2. Pick the campaign in which you earned the female crew member.
3. Click the portrait of female crew member at the bottom of the screen (marked in red on the screenshot below).