There are 3 possible actions :
1. Wait and be patient
2. Increase the fee of the transaction. Only works if your wallet make transaction which support RBF (Replace by fee)
2. If there's "change" when you make a transaction, which sent to your Bitcoin address, you can spend it on a transaction with high fees.
Mempool currently 64000 unconfirmed transactions is this normal It seems to be increasing for hours burying my deposit

Do you have the txid?
I can try & push it through for you if you want on the Free Via Bitcoin Transaction Accelerator.
I don't see how it helps, unless other blockexplorer/node already drop OP's transaction from mempool.