I don't think Binance will scam you of the Luna you bought. Maybe there is some glitches or delay on the Binance system. You can just wait until the system sync. I also buy Terra Luna when I found out that it lost more than 90% of its value. I think this is a great opportunity to buy even though the risk is quite higher than usual.
Binance has nothing to do with luna, now luna has lost a fairly high percentage of selling value, something surprising happened today, luna's price decline was quite drastic, previously I said that luna's journey was more influenced by running hype, then it really proved until now, the coin's strength is unlikely to strengthen in conditions of market correction, luna is very strong in a few days, but after that it lost its best value until now, the habit of disturbances that occur on certain networks causes delays during transactions, this is very common in doing transaction