It is not easy to get a defuel at any airport, especially at short notice.
You need an empty or near empty bowser (fuel truck) and the fuel removed must be put back onto a/c from the originating company it was removed from.
It can sometimes be put on a second parties a/c if they give permission, but is uncommon.
If it is a small amount you are sometimes better off just burning it off prior to take-off.
Hope this helps in why Easyjet had to go down this road.