Hello ! same thing happened to me while using cex.io for Btc transaction on 2nd jan. My btc transaction is still unconfirmed since last seven days. Transaction id is 8afba96d37389a30e77335ed0b70e80722a40f3ede0f7282f0b918de12bdbbc5. main problem is they attach multiple tranfers with my tx id due to which fee is only 9.4 sat/WU. i am waiting for its confirmation for seven days and now i have become hopless because i dont think at this small fee any miner would be willing to pick it up. Can anyone suggest me solution for this problem.