If an online project offers a franchise they usually grant the franchisee to use his own domain but on this one, they just gave him a referral code, either he is a franchisee or an affiliate, for a lottery site it's hard to address internal issues if the one who will address is just an affiliate, he has no internal control he will be acted as a support or a third party.

Either way, he needs to address this if he is an affiliate, there are casinos with an official thread here where an official representative is not coming from the team, at least we know where the representative of this lottery is coming.