I`ve paid for 1 year subscription for MMOviper , but i want a controled situation here, and i want to CANCEL the subscription for MMOviper, i want to pay for MMOviper only when i want to, so where do i cancel the subscription? I do not want to be charged automatically or smth once a year without notice.

You cancel via paypal. just remember prices go up every year.. with an active sub you are locked in to one price for the life of the sub.