This happens very rarely. Few reasons can be network problem where the data is sent by plugin to server but it didn't reached. Sometimes AeroLeads can also be down due to upgrading features. If this happens to you, please mail us to get it resolved as soon as possible.
On https://aeroleads.com/subscription, you can downgrade your plan to free or upgrade your plan. You can also upgrade through https://aeroleads.com/pricing
Give AeroLeads sometimes say 30 mins to a 1 hour as with excessive usage, lot of proesses runs in background and takes time to complete. If you are still having this problem, please mail to pushkar@aeroleads.com with your account email id.
AeroLeads will be able to generate emails 50% time and with some manual work, you can make the success rate to 80% but is impossible to find company names of all prospects and their emails. We will keep working on AeroLeads to make it better though and any feedback and feature request is welcome. You can mail to pushkar@aeroleads.com for such feature requests or bugs.