Hi Max! I took a quick look at your shop. It looks like you have some very good keyword phrases in many of your listings. How recently did you make changes to your listing titles? And how are you currently finding and selecting your keyword phrases? It's very important to make sure that you're using the exact keyword phrases that shoppers are using.
I also noticed that many of your listing titles do not make the most of the title space. If you have enough relevant keyword phrases, then you should use as many as possible in the title space.
If you're on Facebook, then I invite you to join our SEO expert's group on Facebook. Here is the link:
https://www.facebook.com/groups/SEOSalonGroup/?ref=br_rsHope to see you there. All the best!
Renée ♥