I have had a few problems the last month with the web site updating. I called CS and wad told that they had a problem with the website, but when they looked at my account over the phone all stays/points where there. I have not had a problem with points showing up, just with the website. I suggest you call them first to see if it is in your account. If not, then fax them a copy of your receipt (not the best way to do this in my opinion, a simple phone call should be enough for them to start the process of finding the missing stay).
George...