If you have not used your Amazon Prime membership since charging your credit card, you are eligible for a full refund, even if your trial period has expired. This means that if you realize this line for a month that you do not need a subscription, you can still cancel and get your money back. Also, you can get more information through Amazon customer servicebecause the support team is always available for giving you relevant aid.http://amazon.customer-servicephone-number.com/