Sell it. There will be other Father's Days. Nothing worse to my mind than a knife that won't take a good edge. I've had a few Sheffield knives with that problem.
The worst was an Ibberson British army knife, wasn't worth a damn, struggled to cut string. I had an Ablett that I thought took a poor edge. I've a
J. Nowill butchers knife that blunts just looking at it that I shall probably give away. Now not all Sheffield knives are bad, I've some I'm more than pleased with,
so don't think I'm bashing all Sheffield knives. I believe it's quite possible to get a good and a bad knife from the same maker, I've had this with other brands.
I've done the 'Is it my sharpening?' thing and I honestly don't think it is. 99% of my knives are very sharp thank you very much
If Arthur Wright can't be bothered to reply they don't deserve your custom, and they won't be getting any from me. I hope you give them a bad review on HH
Like I said...I'd sell it ( Perhaps to someone here who thinks they can get an edge on it
otherwise it will just annoy you every time you use it, put the money into a better knife and you'll be much happier.