Completely Uninstall Wysija: Instructions

Deleting the plugin will not delete the database tables or the Settings options. Why? It’s a safeguard. It would be quite catastrophic if someone accidentally deletes all your data by simply deleting your plugin.

To delete the Wysija database tables, to perform a complete uninstall,  use this plugin: Wysija uninstall.

If you want to completely trash Wysija, this is an easy solution.