Serious issue for me, win or lose. I do agree with all you guys, it's not about being scammed or anything and to be fair to OP he is only asking where the fairness is if they say it is provably fair.
OP as I know though, provably fair games on Stake 3 are on a different section and non-provably fair ones are probably what you played.
Bet history is a big problem for a lot of casinos though. Most can't keep very old history. Look at dice, is the worst. You can't really find history at best bet IDs. Someone should ask a casino to fix this issue.
Stake is a trusted site and i am sure they will come up with an answer which will satisfy the OP. They have been in the industry with good repute for a long time and no one can survive in the gambling industry if they are not honest. He just need to wait a little until the team from the stake replies.