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.
The op did contact the customer support about the issue and i'm sure the team are working to solve the issue. Stake have good reviews and sooner or later they'll have it fixed and op can check the bet history. Let's wait for stake customer support reply to op and see if it is fixed.