Is it possible for the company to refund the money to the boy?
In my opinion, it's not about whether it is possible or not, but how a minor can gamble on a gambling site, how he can gamble without the casino knowing that he is still underage, so while many people don't like KYC, KYC can also be done to reduce the use of gambling sites by underage children.
I believe some casino allows to make deposits without completing the KYC first then later on ask for it once the user will withdraw the balance like the typical KYC protocol on crypto casino. I have account on multiple online local casino which only requires mobile number and email to create an account. I believe there’s a disclosure that you will agree that you are 18+ above which automatically lift the liability of the casino to a minor players once they agree on it.
On this case. The boy will surely don’t get the refund by just begging for it since doing this will make the casino an easy target for same situation like this.