Work with Katrina to increase your contributions to the overall company value. Engage her on your small to large-scale global transformation initiatives such as system implementation, business enhancements, and process development/roll-out. Also, if you are a start-up looking to start somewhere, schedule call with her for a transformative start!
A few things came to mind when I read this post:
1) Have those email addresses been verified to make sure those are not spam/fake addresses?
2) Why do you think are these customers not converting? Were the emails catered to the needs/interests of these individuals? Are they just not interested?
3) How long has it been since you last followed-up?