If you want to be hooked forever in an annual auto renewal with a company that conveniently fails to provide any trackable means of canceling your subscription, then by all means give this company your credit card information. Their cancel subscription button takes you to a contact us form where you use their form to send them a request. As soon as you hit submit, there is no proof that you ever sent a request to cancel. Take screenshots so you have proof to give your credit card company