To change or cancel a subscription with Meundies, customers can manage their accounts directly on the Meundies website. First, one must log in to their account using the credentials associated with the subscription. Once logged in, there should be an account settings or subscription management section. Here, customers typically find options to modify their subscription details, such as changing the frequency of shipments or selecting different products. To cancel the subscription, there should be a clear option available within the same section that allows for cancellation. After confirming the cancellation, customers may receive a confirmation email regarding the change. It is always a good idea to check the specific terms and conditions related to subscriptions, which can typically be found in the help or FAQ sections of the website for further guidance.