To make a withdrawal from your account, simply click on the "My Account" tab on the home page. Navigate to "Make a Withdrawal" and enter in the appropriate details. Note that you will be unable to withdraw if your account is not verified. For help with verification click here. Australian law requires that all funds deposited must be turned over at least once before they can be withdrawn.
Read more on verifying your account at https://help.swiftbet.com.au/en/articles/6219673-how-do-i-verify-my-identity