Hi Rosauro,
You can cancel an automatic payment (06 months membership or 01 year Developer Package ) ANYTIME you want.
If you are using Paypal, please take a look https://www.paypal.com/us/selfhelp/article/How-do-I-cancel-an-automatic-payment-I-have-with-a-merchant-FAQ2058
For 2Checkout https://www.hostinger.com/tutorials/payments/how-to-cancel-payment-subscription-on-2checkout
Thank you
