Mettle by Abby review for Mailmunch Forms for Mailchimp

This app is helping me capture e-mails, but it won't import them into my Mail Chimp account, so I'm considering deleting it. I've tried troubleshooting multiple areas without success. I would gladly update my review if I could make it work. It doesn't make sense. It's basically a Mail Chimp app, it shouldn't have problems like this. I also have issues importing the CSV file. It only adds a fraction of the e-mails. Now it's even giving me problems trying to review it. Which it keeps nagging me to do a review, but won't let me submit.