I have heard people complaining on bittrex before. It was about the notification that all coins which fail to provide some documents till a cretain deadline would be delisted.
But why is selling funfair a pity? The coin is scoring high and one is supposed to sell high, right? You must have got profit with it already anyway, but if you really believe that this coin can score more, then just do what others say - transfer funds to other websites. I guess it would be best to sell fun for ethereum and then withdraw ethereum to binance. Good luck with all that trading!