Hello Stephen!
I'm sorry to hear that you're less keen on the Kalingwe, especially because it is one of my (personal) favourite coffees! It is definitely not for everyone though as it is quite a fruity natural. Feel free to email us and ask for recommendations if you have a preference for either washed or natural coffees, or specific flavours, and we can always try to point you in the right direction.
As far as moka pot goes, it is a really difficult brewing method to nail. It's so difficult that James Hoffman did a 4-part series on how to brew with a moka pot which I highly recommend and will link below!
The recipe that I recommend is the following (for a 4-cup moka pot): Dose = 20g, Liquid in = 320g, Liquid out = 280g, Ratio = 1:16, Grind = Medium to medium-coarse. Most people tend to grind too fine for moka pot and because the water can't percolate fast enough through the puck then steam builds up in the bottom chamber and then travels through the coffee and creates a burnt, bitter flavour.
I know this is all very complicated so my main recommendation would be to just try to tweak your grind settings (if you haven't done this already) and to reach out and let me know if I can help at all (just send an email to info@glenlyoncoffee.co.uk)! It may just be that this coffee isn't suited to your tastes though.
James Hoffmann moka pot series: https://www.youtube.com/watch?v=upgQsA5kLAk&list=PLxz0FjZMVOl1Zot3qiJ-wseRXyO-XoVNx
Happy brewing,
Nick | Head of Front of House