The Autopay discount is based on a long term member taking advantage of the convenience of Autopay as well as the discounted membership fee each month. For that reason, if you decide to cancel your Autopay in less than 4-months, you may do so by paying a fee of 150 MXN for each month you had payed only the discounted autopay rate. After you have been billed at least for 4-months at Autopay discounted rate, there is no cancelation fee :)