You have posted an image where it is mentioned that you have multi accounts. Multi-account cant be considered the maximum of the platform. If you really have multi accounts then they are not scammers. And if you don't have a multi-account then you should prof that you don't have a multi-account. You should provide KYC documents and others for that.
It is mentioned by who? Them lying out of their teeth to simply refuse paying? 
I have only used Dexsport.io ONCE and they are lying thieves. You probably work for them or something. There are A LOT of bad reviews about them online which I missed to read before using them this week.
Their wallets are EMPTY and have no activity either.