Why not try to use another platform where using vpn is not restricted and you can withdraw your funds without going through KYC or maybe depends on the site. If you continue using the same platform but you will need VPN to gamble and once you win, you can never get your money since where you from is restricted in their platform. Letting you gamble withoit doing something could get them in trouble.
He wants to use sport exchange and Betfair has largest exchange platform.
That's why he wants to stick with Betfair.