who winners ?

they do not pay me 0.05btc which I won in their lottery in 2016. They say that I have many accounts. I explain to them that I played through a vpn-plugin which has a limited number of ip addresses. because their site bitcasino.io is blocked in Russia. Accordingly, many people from Russia played through this plugin and many had the same ip address. They do not want to listen to anything and ignore me. What is better to do in this situation? Documents are uploaded through the site, I can provide them with anything from documents, but they do not want to hear anything.
Thank you and Sorry for Google translator)))