Has anyone successfully booked an appointment to convert their license at the Kadoma center?

I posted about this recently and got some very helpful replies. Anyway today they have a 1 hour window to call and make an appointment to go in a few weeks to convert my license.

I’ve tried twice now and both times for the whole hour the number just gives an automated voice saying it’s too busy. I can’t go without an appointment and can’t call to make one so am I stuck?