...you could contact the user quickseller in roder to accelerate your transaction (you'll have to pay for this also).
In addition to
Quickseller there is another user called
macbook-air who also provides a transaction acceleration service. Both of them have access to mining pools and charge a fee for the service. Quickseller's got good reviews.
I faced a similar issue a few days back transaction not getting confirmed due to low fee but user "QuickSeller" got my transaction confirmed in minutes when I sent him 0.0001 BTC. He has access to some pool . PM him.