I have been trawling the web looking for one that works and i finally found it, its a demo that lets you connect to serveral cities in usa but only for 7 minutes at a time which is enough to get connected and playing pretty fast also...

this is the link to the vpn website so you can have a read and decide if you wanna try it

http://tinyurl.com/2brjjvh

Have fun in Vindictus.

BTW i have tested it and it works perfectly and its very tiny