After 1 hr 40 mins on the phone, my $360 in reservations are *partially* cancelled. Refund cheques to be mailed in 6-8 weeks.
Apparently BC Parks changed its reservation system since last fall, which, according to the tired-sounding phone agent I spoke with at length, has created some ... issues.
So if you've been meaning to do that, I'd advise setting some time aside and getting on it sooner rather than later.