I've also been waiting for refunds for over a month now and am considering the charge back.
SAS deliberately did not cancel my flight despite not selling tickets for it anymore and sent me three e-mails in four days (from 14 till 10 days before departure) reminding me that I could get a voucher for that flight before cancelling the flight the next day (nine days before departure). If SAS had actually cancelled my flight when they stopped selling tickets for it, I could've rebooked my flight to an earlier date where the flight was still going, but as this was only a few days ahead the price was significantly higher (and the voucher wouldn't suffice). I therefore do not feel bad at all for making a charge back. SAS really handled all of this horribly.
However, I see that SWISS is not offering any refunds at the moment so I guess someone is actually worse than SAS...