Ignore the free site, and the plain step by step. I don't have the time or the extra money being around christmas to get something up and running thats flashy.
This is a solution, if you are unable to do a RBF or a CPFP transaction. It worked for me and should work for you, provided your txn has started falling out of some mempools, which if it is stuck and low fee, it likely has.
I can answer questions in here if needed, but it is pretty step by step. You are basically creating a double spend, and forcing that to be confirmed. Not the ideal solution, but it works.
https://mylbcguy1.wixsite.com/fixmybitcointx