If you've sent over 0.5BTC it should automatically get returned to you. Its only kept when its below a certain BTC value due to the BTC fees involved in sending it back.
as you can see I included a fee of 0.0016, though the bitcoins were never returned. also it wasn't included in a bet, the whole return should have been something like 0.53 bitcoins
LOL you should get refund 0.5016.
as far as I can see you didn't understand it, I have sent 0.538 bitcoins with 0.0016 fee, so it wasn't played, that's why I'm asking to be refunded 0.53 bitcoins