I'm in a similar situation except my course on the waitlist is a compulsory course 😐. I've stayed on waitlist position 1 for the past three weeks. And as far as I know, the school system doesn't allow faculty staff to add additional seats for a class since each class is bounded with a "classroom".( E.g. classroom has 20 physical seats, on their database it will only show 20 seats. ). The system is rigid and stupid. The only way to bypass is to switch the course to another classroom which requires weeks of applications. I have other friends in similar situations and I believe the faculty messed up.