Since you already tried "-zapwallettxes", your client is now no longer broadcasting this transaction.
You have four choices(I listed them after difficulty):
1. Wait until it gets dropped from mempool or picked up by a miner.
2. Ask miners for help.
Since you are in urgent need: bitcointalk.org have plenty of members providing free transaction accelerator services. You can also go for the paid services, but be aware don't fall for the scammy ones.
3. Attempting a Replace-By-Fee (RBF) double spend transaction.
4. Attempt a Child-Pays-For-Parent transaction if you are also the recipient of this transaction.