I canceled via email, phone, and snail mail. Then I did it again and again. Three times I tried and STILL they charged my credit card. They did this for 6 months. I called to complain AGAIN and the woman answered said the company doesn't work with the call center anymore and they have no forwarding number. So I got a new credit card number and when my card was "Declined" I tried one last time. A woman answered and SAID she canceled it again. We will see, either way they can't charge my account. This was an awful experience, it was not worth the money I saved (which was only 10 dollars more than the plan).
Avoid this site! It will only cause headaches.