Really not unusual at all, SAS doesn't have phone staff for any passengers other than the Diamond line during the weekend either. At outstations the local handlers can rarely help or simply don't show, even at major airports such as CDG and AMS this has happened to me. The Diamond line best case has 1 person working and then another 50% chance that person decides to answer the phone. I've been in queues in excess of 2 hours trying to get through.

Best solution is not to fly SAS and find an airline with 24/7 support or at least for business / elites.