Sent ETH from Binance via arbitrum chain

Hi guys I want ur help actual quick.

My brother ship some eth to his good friend from his binance acc to his associates. He used the arbitrum community and the transaction is accomplished however his good friend never acquired the crypto.

I found txid on the arbitrum community and the crypto is on the account hes pal have him. Is there a method he can reach that crypo one way or the other. I don't understand how thay did that. Can he create a wallet with the identical identify "0xc941.." so he can take his crypto or what.

And is there a binance help e-mail on which I might write.

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I hope you possibly can perceive what happend.

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Thanks prematurely