If this game works like any other subscription MMO when you pay for gametime you're not allowed to turn it off and on as you please (You can probably imagine this being pretty easy to exploit). In other words, if you cancel your sub, your 3-month gametime would still run until you were finished with that three months, at which point your account goes inactive until you decide to re-sub again.

So basically you're stuck with that block of cement on your head for at least whatever amount of time your sub has left. I'm not entirely sure how the Fantasia handouts work- I was under the impression it was a one-time thing for subscribing, but someone can correct me if I'm wrong.