Prepare your personal information. Have the credit card with which you subscribed to the magazine handy, as well as the mailing and billing addresses and name the subscription is under. Have a copy of the magazine handy and locate the account number, found above the name on the address label on the magazine cover.
Look up the magazine's customer service information either in the magazine itself or on its website. This information can usually be found either in the fine print in the last or last few pages or under the "Contact Us" section of a website.
Contact the customer service department. Provide the needed information when requested. The call shouldn't take more than 10 minutes. You can also cancel the subscription online, but there may not be an immediate response to the request.