As an online game with a montly suscription you did agree to have them updating the game every now and then to add content or hot fixes to the game you have purchased and again, are paying a monthly fee to them to do just that. Also, and you can read the ToS if you want, where all this is stated, your character is never of your property but SE's.
Suscription fees are what keep the game alive and guarantee us new content and bug fixes. You may or may not have updates and fixes on a free-to-play game too, but in the case of FFXIV, your money actually goes toward keeping the servers up, and pay the staff to create future content and bug fixes.
Before calling out people as bright ones and with sheer genius, please read what you have signed up for first, because you do sound like a troll and there's no surprise on getting these reactions from your fellows.
And to answer your question: No. You won't get a refund of a 25 hours offline server.