Firstly, you can get around the 1000 character per post limit by simply posting a few lines and then going back and editing in the rest.
Secondly, I am not sure exactly what the problem is you had with your Fantasia - did something go wrong with the transaction and did it debit your account without actually sending you the item to your inbox? Did you successfully get the item but it did not 'work' when you used it (as in, allowed you to change your appearance on the login screen)? The Fantasia is pretty tricky to use from what I understand, in that after using the item, you need to strip your character of all gear completely (with weapon excepted of course) before the character edit option becomes available on the character selection screen.
As for the SE Support line, their agents are actually limited by what they can and can't do, and thus have no choice but to use boilerplate responses for tricky questions they cannot help with (which is standard customer service, speaking as someone who has worked in customer service in the past), so getting upset with them does not solve anything.
Your claim you have friends who were given free Fantasias by GMs seems suspicious too, as this I have never heard of GMs doing this, although SE does offer what they call a 'one-time item rollback', in that SE has a non-advertised policy if you lose an in-game item (such as an item disappearing from your inventory mysteriously after a server crash for instance) the GMs can restore it.... one time only. You can only do this once for the entire life of your account.
So your friends probably used that service to restore a Fantasia because they didn't like the changes they made to their characters anymore and couldn't be bothered buying a second Fantasia and foolishly used this service to get a free one (this item restoration service was meant for items accidentally lost due to bugs and server crashes, not changing your mind after using them).
Fantasias are a one-use item, once you confirm and save the changes on the character edit screen that's it, to change back to how your character was before the Fantasia or to make any more changes you need to buy a new Fantasia, that's how it's always been since the very beginning of the game's service I'm afraid.