Free access to paid users after WiFi outage

Hi

We had a period of WiFi outage on one of our campsites . Is there a way that we can give them a free week of WiFi for those users who have paid up via paypal for 7 days but did not have the WiFi they expected

How do you highlight who would have had an active profile during the outage and then add extra credits?

Many thanks

Mark

Is this not possible with User Manager?