The simple answer to whether you can get a refund or not is that bets cannot be cancelled once they have been placed, but some bookmakers will allow you to Cash Out your wager. Or maybe they added something to their bet slip, changed their mind but pressed the wrong button and placed the bet rather than removed it from the slip altogether. Perhaps they were trying to figure out how a new website that they haven’t used before works, for example. There are a few reasons why someone might have placed a bet by accident.