If you have won a cash prize then your balance will be visible in the My Account > Prize Claim section of your Slots Temple account.
You can withdraw funds (minimum £10) here by simply clicking on the 'withdraw' button, and then registering your Debit Card (if not already registered) > enter the amount > click on 'withdraw'.
Please note that any payment methods used to withdraw funds must belong to you, and be registered in your own name. If you have previously made a deposit then for security reasons you must use the same card for any withdrawals.