Solved i cant buy buff

You already created a thread here on the same matter http://forum.eternalmu.com/threads/buff.539403/ and you still didn't mentioned your character even though you've been told to do so.

If you cannot buy seal of ascension it's either because you don't have enough inventory space or you're a 3rd class characters that can only use master seals and not regular seals.
Tell us your character name and post screenshots with your character (c) window, Inventory (x) and xShop while trying to purchase the item.