The transactions are  not reversible and that is why you should becareful when doing transactions using etherdelta or any others exchangers. The only way you can get your fund back is to pray for God to touch the receivers heart in other to send the tokens back for you.
Many mistakes like these are happening every day and I do believe that one has to be focus when doing trading in other not to continue beating yourself. I believe that is why some people are advocating for centralize system. A decentralized system is not control by any one and nobody you can contact. However, I will like to said that sorry for your loses and please be careful when ever you are making transactions.