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Next, to cancel the FuturePay agreement, log into the WorldPay Administration Server with your username and password at: http://www.worldpay.com/shopper/. (Your WorldPay username and password should have been emailed to you when you registered).
This will give you access to your agreement details. Go down to Customer FuturePay Agreements and click where it says 'Change Details'. In the bottom right hand corner you will see a button saying 'Cancel'. Click this and confirm. You will then receive an e-mail confirming that your agreement/subscription has been cancelled.