Have you contacted BC.Game
supports? Instead of creating this thread, I think it will be more effective to contact the team directly.

It's your responsibility, as you were aware from the beginning that your country was prohibited by the BC game, yet you chose to use a VPN to bypass the restriction.
Yep. There are countries that BC.Game prohibits due to few factors. So, the people from that countries can't join BC.Game even if they use VPN. It is quite unfortunate that he doesn't obey the rule.
You also cannot sell it, as the first document you submitted was in your name and will never match anyone else's.
Besides that reason, I even doubt that there is someone interested in buying the account. Everyone must be aware that there should be a suspicious thing that someone wants to sell their BC.Game account.