Is there a way that IATS can retry failed donations 7 days after the failure happened rather than the following month?
The retry attempt on REJ response is dependent on the type of failure. Card Reported Lost or Stolen e.g. will be bumped to next month - whereas other failures will attempt next day. Note that you can always catchup or hit Process (if using iATS Legacy) after e.g. updating a Lost or Stolen card so you don't need to wait until next month to capture the monies.