Seeking Miner for RBF or CPFP on 2 BTC transactions. $100 USD offer. Please post if interested.

I really need some help! Yesterday, I withdrew some BTC from hitBTC to one of my other wallets. While I understand there is a current lag with verifications, but now my transaction hash has completely disappeared from the blockchain "Transaction not found". Can anyone help explain what is happening?

Address: 1MgVzBuGh6VJckBuS1QRxLGPqxyHZJXsHs
Transaction hash: f78af9010abbb89df9f2e97e6d2c0a8ed291c69987fc289e2317b4eb0584523f
Operation ID: 0bce2e3d-c048-438a-af31-6ff05714a3cb
Date Created (-05): 26/12/2017, 12:40:37
Date Updated (-05): 26/12/2017, 12:40:37