Dear Ralph,
I'm not quite sure what you mean by "everyone else" in this instance. PMI forced the move from content providers by updating all of their exam material towards PMBOK 7 and placing other restrictions on content providers. in other words, Prepcast was forced to retire the old material. Prepcast didn't arbitrarily make the move.
Prepcast gave 6-months of warning to everyone that the old training courses were going to be retired in December 2022. From my perspective, that's ample time to finish a 40-ish hour course. I doubt that you'll be eligible for any kind of refund at this late stage., but you will need to contact Prepcast Customer Service to request that.
Harry