If you want to get an exhaustive list of people that have unsubscribed and who no longer want to receive emails from you, all you need to do is create a list of contacts here: https://app.plezi.co/contact_lists then follow the steps below:
1.Create a new list and call it, for example “Unsubscribers list” ;)
2.Add a filter on the contact’s properties below:
It is then possible to export the list of contacts. Click on the blue button to export the list.
This list is also available in the “Contacts” page.