We are just a forum. We do not support any form of dueling system.
If you want to duel, use this site: -> http://www.duelingnetwork.com/ <- as stated in the starter guide and within the posts above.
To get duel points, you duel on Dueling Network and then post the outcome of the duel in the Battle Arena section.
If you don't know what to post in the Battle Arena section, look at the previous threads. There are tonnes available for referral.
It really isn't hard I don't see how I can make this any clearer.