If you would have tried this suggestion, your transaction would have been confirmed by now. ViaBTC is the only free accelerator that (still) works for me. I used it 2 seconds past the whole hour yesterday.
I can help you out, but last time I did the promised tip didn't happen. Therefore I feel better helping someone who doesn't promise a tip
Whenever a transaction gets confirmed, anybody can claim they accelerated it.
You have 10 minutes left for another shot at ViaBTC!
The whole replace by fee and accelerator services wouldn't be needed if Bitcoin would scale. Bitcoin is broken for so long now
Update: at 11:00:02 (local time) I entered my own transaction into ViaBTC successfully. At 11:00:11 I tried yours, but it was full already. You can try this every hour.
Update: at 12:00:02 I've successfully added your transaction to ViaBTC's queue. My transaction from an hour ago is confirmed already, I expect yours to be confirmed in the next block ViaBTC mines.
Update: at 14:11:48 (still my local time), ViaBTC confirmed your transaction after 26,199 minutes. It now has 5 confirmations already.