The TXID is 7ab4a3f7b8856af906ef595c83f5d2dcea60f96a4130c5b8ac7b1cfa22ab2d2f. The transaction was confirmed so im assuming that it went through. Any suggestions on how to approach the bittrex support team? They're not super responsive..
Did you try to post on their Facebook wall? If you post there that you have sent your BTC to the wrong address and you want to pay the 0,1 fee but they are not responding, you might get a faster respons than when you email them. They do not want negative publicity so posting on their social media might work. Be careful though because it can also work out the other way...