As TalkStar has said, have you even tried contacting their Support and asking there? The chat support there is so super quick and I guarantee you would have gotten an answer and your money back faster than it took you type up this scam post...
I highly doubt that Stake would scam you and not follow their own rules...
Try it in a polite manner in their chat and you will get an answer and most likely you money back.
I went directly to their live support when I saw the bet was misgraded. Darko told me I was wrong and then blocked me from using live support. I did not curse or anything, worst I said was I’m being scammed when he refused to correct the bet.