Hhampuz is a very reputable user and conscious about the people or company he represents. Some of his reputations counts for Fortunejack.com too and they are a one of the reputable company on the forum given the fact that, they haven't given any cause to be alarmed until now.
I practically read through your case and examined the proof you provided which were rock solid based on placing of bets but, when it comes to the terms for which these services where offered, you erred at OP and that simple neglect is what brought a cancellation upon your preceeding bets and wins.
I mean, I can't blame you, no I won't! Not many of us if any at all gives attention to terms & conditions to services rendered and you can tell that sometimes these T&C that are meant to guide us could also trap us and favour the company once you neglect them. Being ignorant of them becomes your first offence and to amend for that, most companies have relatively similar T&C so, you just have to grasps the bases and relate to all.
To be sure of your flag in this case at OP, I had to go over some of the T&C of Fortunejack.com and as you can see, an issue like this one is addressed right there in the T&C, last updated on November 05, 2019. Far before this event took place. I'll quote the portion that matters right here and ink it in red.
Placing a Bet and Maximum Payout per one Bet
The Company accepts current bets on various sports events based on a program published by the Company.
Bets are placed in mBTC and the minimum amount of a single bet amounts to 0.01 mBTC.
Information about any bet is kept in the database of the Company and in case of a controversial issue, the information kept in electronic archive of the Company is preemptive.
If a User places several identical bets, the Company reserves the right to cancel similar ones and consider the first placed bet as active.
Placing a bet is possible on guessing one or several sports results.
Link to Fortunejack.com sportsbook T&COn this, Fortunejack.com is at right. What you ought to realise at OP is, bets comes into cognisance most times when it's a big win. There isn't a smart contract working that out without a human authorisation which comes after some scrutiny. That could account to why your bet wasn't cancelled when it was placed and only after winning. The better question here is:
Would that have been the case in the event of a lose?
Perhaps you can find that out when you loose to same betting pattern! Maybe you could fight them with this terms then. Else at the moment and with the presented facts, Fortunejack.com is at right and have paid you as due. Fortunejack.com is not a scam platform.