Try to see if child-pays-for-parent can work. Transfer the output of the unconfirmed transaction to yourself in a new transaction, paying a higher than usual fee. Enough to cover the unconfirmed transaction, plus the new one, and maybe some more, I don't know how much but see a calculation below.

An example of executing CPFP:
https://youtu.be/dUJyfz0QQXw?t=35s

You'd need the private key for that address:
https://bitcoin.stackexchange.com/a/5933

Be careful about exposing private keys. In case of doubt, move the sums quickly to a new address.

The stuck tx is 2.5KB, your new one is going to be 0.25KB, so let's say 2.8KB both.
Check here the current fees on the network.
I'm not sure if there's a need to pay the highest, and I don't know if there's a need to pay an extra beyond that.
But assuming 120 sat/byte for a quick confirm, that's 2800*120 = 0.0033'6000 fees.

For all I know, it might work for half that much or less, just with a longer delay. You can also wait for a time when the network is less congested and the fees are lower on average. Maybe someone with actual experience with CPFP could chime in about the fees.