OK well... Update... The credit didn't just "process" in 3-5 days as indicated... Eventually I sent an email to CS, they ignored the first one, sent me back a copy of the invoice on the second one, and I think they actually read the third one.
The answer was a seemingly pre-scripted response which really had nothing to do with the situation, but they processed the credit. So all good on this end.
If you see a good deal somewhere out there, book first and ask questions later. I guess that's the lesson. might work out in the end.
YTJK