Computers have problems from time to time. If Bookmaker followed the rules as they were published before the game, then there is nothing to complain about. If you aren't comfortable with the rules, then you shouldn't be betting on sims at that book.
Edit: What is this "catch all" rule they cited in this case? After writing this post, I went to read Bookmaker's rules just for giggles, and I see nothing which allows them to restart a game that was aborted.
https://get.bookmaker.help/hc/en-us/...rts-Sims-Rules
In fact, the closest thing I see - which admittedly applies to stream outage, not computer freeze - actually calls for wagers to be voided if a game is not finished. I know this is specifically applicable to computer freezes. The only reason I outline it here is because I see nothing which applies to OP's scenario any better.
There is this rule, but a reasonable reading of it only applies to glitches which occur during the game. It does not appear to grant permission to replay the same game over again.
Especially when you consider the example that they give:
Is there another rule I'm missing here?