Zero satisfaction

Terribly disappointed in Flysafair, my fight was for 06:00 and when I attempted to check in 25 minutes before the time( I understand the 40 prior rule but they only tell you that when it is to late) they refused me. Last time I boarded a flight a was mutch later then that and there are always passengers that are still allowed to board the flight after departure time. No sms was send to me that said my flight is now boarding.