I have the same problem. Sent a transaction with 2000 mBTC, but the fee of 4mBTC/byte was suddenly too low. My fault, I know. I would also be willing to pay if someone could accelerate it.

Tx ID:  1f63abb7ed3ce55bdc331644656f3e153d148fdf5d34360a4bf65b149be4aae5
Blockchain Link:  https://blockchain.info/tx/1f63abb7ed3ce55bdc331644656f3e153d148fdf5d34360a4bf65b149be4aae5

Please help me, it consists of a very large transaction. I will definitely send you something!