Jrichardf was saying that he can't cancel because that particular rate on MR.com doesn't have a 24-hour cancellation window (if I'm understanding correctly).

I agree with BKKLEE that you should never just accept a denial, if you believe it is incorrect. I've routinely emailed them after denial and gotten a positive response. If it's getting close to a 24-hour cancellation window, then of course I'd just cancel and try again.

I've actually never sent the LNF team a screen-shot (or even taken one)...because I figure if it's there they can just look it up (and if it's not there, the screen shot won't help). But if you were trying get a "free" cancel after the rate disappeared, it might help to be able to say that you have screenshots of the original LNF claim and the original competing price (now gone). You'd think that they would take pity on you.