If you have unusual and honestly BS rules, then it should be readily available.. i should not have to ask live chat..
I hate the rule as well but it's not the site fault , you should had asked about the rules before betting
you missed a winner ok , but the other guys who took the other side of your bet also missed a loser so there is no benefit for sportsbet in voiding your win since also sometimes they will void you losers as well
hope they change it but you don't have the right to demand the winnings since the odds provider voided all the bets on that game