Do you think what the sportsbook did is reasonable?
I have experienced a case like yours, initially the bet I placed was successful, but after the match finished I didn't get paid/was rejected.
Then I contacted support, they gave me answers over and over again automatically, they said.
Dear customer.
Sports betting is often rejected due to technical reasons, bookie rules, or suspicion of cheating. The main causes include incorrect odds (prices), bets that are related to each other in one parlay, restrictions on the bet amount (maximum), technical problems with the site, or suspicious activity that indicates match-fixing.
I still keep it until now, whether my case is the same as yours, but that's the fact.
That's when I stopped and didn't want to bet on the sports betting site anymore, even though I was annoyed, but they didn't deduct my balance, only my bet was rejected, so I thought the sports betting site was not good for me, so I decided not to. use it again until now.
However, I don't know about your case, you should contact their support first, who knows there might be a solution for you, but I'm sure you won't get paid for your winnings, the system spoke/rejected.