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Contact binance support and complain to them, since the wallet change is from binance there is possibility that they will recover your USDT from the old wallet to your new one, I see that you mentioned that you copy the address from binance, so the effort is correctable, since you are coming out timely to complain about this, sometimes ago I made similar errors in depositing to an isolated wallet address, but thank goodness I was able to recover the funds at the end.
OP might have been affected my clipboard malware. This malware tends to change the deposit address you’ve copied into the scammers own when you paste them. If the OP cannot make the deposit manually then it’s not an old address from binance since he also said he didn’t find the address on binance and was sure he copied the right address from the exchange. He needs to scrutinize his system and flush out the malware to avoid further occurrence of such in the future.
how can i contact a real agent from binance ? all i find is the bot , its not useful .
If you’re affected by clipboard malware which it seems like, even a real agent won’t be able to do anything about it. Your problem may not be something the bot feels needs a real agent to help resolve and it can do it on its own, that’s why you’re not been directed to a real agent yet.