The addresses of those two chains are the same, you were scammed

What should I do if I selected the wrong mainnet when withdrawing?
The other party only accepts the BSC network, but I accidentally chose the OPBNB network. The withdrawal has not been credited. Customer service said to contact the recipient, but the recipient said they haven't received anything. Customer service advised me to try contacting OPBNB customer service, but I don't know how to do that. Is there anyone experienced who can teach me how to resolve this? I'm a complete novice and don't understand many technical terms. I just want to retrieve my coins. Thank you.