How did you deposit in the first place?
I know Bet365 does not accept crypto deposits or withdrawals at the moment, before depositing money on any platform, I think it's common sense to first of all find out how to get your money out first, you don't first deposit and later, try to find out what their means of withdrawals are, for personal, I know that depositing to several casino that do not accept crypto is very easy with credit/debit card, but withdrawing is most times where the problem lies.

Like Oshosondy said, Bet365 withdrawal options depends on your country of residence, so depending on the country where you live, some options might work and some might not, I will suggest you contact their customer support for proper guidance.