Their Terms are clearly that they prohibit users from Russia
OP had verified his KYC documents in 2019 despite being a resident of Russia. I think that Russia wasn't included in the 'restricted countries' list when he completed the KYC verification. I just found an old post of Playbetr representative about the restricted countries, Russia wasn't in the list in 2019.
Hi Guys, just please don't play from Australia, United Kingdom (and all UK dependencies and territories), and the United States of America (and all US dependencies, military bases and territories), in addition residents of Singapore. We would love to provide our service to everyone but due to licensing restrictions and regulations we must restrict the countries above.
Perhaps, Russia and few more countries were added in the restricted countries list of Playbetr terms in 2020 or 2021. The situation is a bit complicated here for this reason. I have sent an email to Playbetr support and asked them to give some updates here.
@Virtykza, Maybe you aren't going to receive the refund of those deposits which you had lost there by placing bets. They have returned your last deposit of 0.05 BTC though. In my opinion, Playbetr team should have blocked the access of your account when they added Russia in the restricted, because your account was KYC verified as a Russian resident.