Recovery of list

Due to new hoster sending limit we were not aware of around 200 emails, those 200 mails did not get out and we need to send them out again. CPanel has an error log showing the affected email addresses. I copied that emails and imported them to a new temporal list and was already wondering why there is no “add without modification” or such option. Now with out me wondering all subscribers names are missing as the plugin overwrote the accounts and deleted the names. Of course CPanel just knows the emails so I had just a list of mails..
Intuitive I would have assumed new subscribers will be created into the list after importing without changing the existing ones… Prior to that try I was using “skip” and the plugin did not import one mail..

How can I recover the mail list where those 200 subscribers had names? Is there any backup file in the plugin folder?