I was able to buy shares on binance without money in my bank account?

Back in may I purchased 4500 USD worth of shares on binance which was linked to the wrong bank account. A few days later I realized that the bank account I was linked to didn’t have funds in it so I wasn’t charged the 4500. On binance everything looks good, it shows that the money was deposited and the market buy order went through. I’m very confused. I’ve tried contacting customer service multiple times but haven’t gotten a response. I’m curious if this has happened to other people and what I should do. Did I just end up with free money?