If you have them, you created them as a control and safety measure, and it's worth thinking hard about whether you want to try your luck again or spend your winnings in another way. If you're feeling flush from a win and want to try your luck again, it's worth reminding yourself about any deposit limits you may have set. If you have a cash balance in your account, you don't necessarily have to withdraw it. After that, you'll be able to choose an alternative method.
You must first withdraw the amount deposited via the method used to deposit.
Just like when you made your deposit, you'll see withdrawal options available.