BTC SCAM ON BLOCKCHAIN.COM

Good day fellow people, so a while ago I was contacted by someone regarding my job since it is related to crypto. To cut to the chase. The person would send me BTC to my blockchain.com wallet. Just the wallet NOT THE EXCHANGE. Normally downloaded from the App Store. The person would send the money first which created trust. Over several month I worked with him there were never any problems but I was still cautious. Also once the btc would hit the wallet I would wait until I could withdraw it which indicated to me that the transaction had already at least one confirmation. Then one day we did a deal like always. His BTC arrived and I send him my crypto from a different wallet. I send him my crypto to his wallet and some magical way the guy was able to revert the Btc transaction even though it was already withdraw-able on my side. Obviously disappeared right after. Luckily it was not a huge amount but only 600$ so I didn’t really care about the loss. The point is somehow that guy was able to reverse the Btc transaction. Now there are ways to do it but none which make sense for 600$. I knew contacting blockchain.com support wouldn’t bring me far but thinking they are a big institution they might do some deeper checks cause they have better blockchain analysis than me obviously. Of course support didn’t care at all which was expected. THIS IS JUST A WARNING TO EVERYONE. However if someone knows what that was let me and others know.