Update: The whole issue *appears* to have been a lack of communication. (SOKY didn't answer my calls or voicemails for days, the group's Fb page was apparently temporarily down for some reason, and I wasn't told that they were no longer working with the former transport company).
I posted this same question on a Fb group, and the verdict there was that it was definitely a scam, but people appeared to be very angry and have an agenda... so I'm not very sure about the credibility of some of those comments.
I finally was able to get in touch with Jeff, and SOKY is arranging transport for Lemaan with a different company. I will update again in a few days and let everyone know how this turned out! Thanks again for all the feedback :)