Yes, if a fight is cancelled or declared a no-contest, your bet will be voided and refunded automatically.
As per our Terms & Conditions:
“In the event of a 'no contest' being declared, all bets will be made void.”
If the fight is postponed, your bet will stay active for 7 days (inclusive of the original date). If it still doesn’t take place within that time, your bet will be voided and refunded.