Dcoin is an underrated shit exchange! Most of their volume is fake, like Bitforex! Last year I created an account on Dcoin to sell my SSX coin, and I faced the same problem as you! The same thing happened in Bitforex with Myo coin! I think LEDU coin is listed on other exchanges, too; you can try there instead of Dcoin! Because the team or the exchange bot are only buying their sell orders, it means absolute fake volume!