Binance is acting like "bank" but without wanting to be a bank, they are actually worst than a bank, I have never seen a bank giving funds to someone that deposited to a wrong account, binance however can do it.
Imagine the situation from outside your perspective.
You post an offer. A user accepts the offer.
You paste down a name and phone number in the trade. The user proceeds with the transaction using that information.
Binance sees nothing wrong with what the user did - in fact, you're the one that looks shadier here!
That might not be the truth, but those are the optics for whatever support agent handled your case.
You did get conned, but that's why trading platforms demand stringent caution.