The customer is responsible for ensuring that their wager is correct before placing it, with most bookmakers saying that a bet 'cannot be cancelled once placed'. A bet is essentially a contract, you agree to pay a stake and they agree to pay you winnings if that scenario happens.
As a general rule in betting, once a bet has been 'struck' it cannot be cancelled. We build in a number of confirmation steps on the Bet slip before a Bet is accepted. This gives our members enough time to confirm all selections and funds before committing to the Bet.
You may delete a bet from the betslip in 3 different ways:
How can I delete my bet/pick from the betslip?