Why is my transaction still unconfirmed? I have sent 0.06 to Bitmixer.io and it's unconfirmed for more than 9 hours, but address will stop working in 3 hours! I don't want to lose my coins, so.. Is there any way to get them back?

https://blockchain.info/tx/9fa3b45906a95cd9a7919161e08b1e2e238378da2858aabd363b21eb15aedaca