Was the scamming exchange blockchain.com (or a blockchain.com impostor)?
Given the information i got from the OP, i'm strongly under the impression the op was using a real (non scamming) exchange as a wallet (witch isn't a good idear when talking about opsec) and a fake blockchain.com's address he was funding.
I'm not under the impression it was the real blockchain.com company that was defrauding the OP, but i'm pretty sure he was defrauded nonetheless.
This being said, i did not get 100% conclusive proof of said impression, since i got a lot of information from the OP, but not everything... In the end, it doesn't really matter, he was defrauded by a scammer and there's not much we can do (except maybe helping him trace outputs in the odd chance the scammer is stupid enough to try to exchange those funds on a KYC exchange without anonymising)
I don't know if it will be the same case of the OP, but Royse777 talked a month ago about a fake blockchain.com:
Real or fake blockchain dot com
We will have to see if more cases like this one come up.