Ring store discount not working in UK

I am based in the Uk, I have a Ring alarm system and cameras bought through amazon. I have signed up to Protect plus, partially to get discounts on additional items. However, nothing i select qualifies for the 10% discount, whether I go through ring or amazon with my linked account. This morning I methodically went through the whole shop adding things to my basket and nothing in the shop triggered a discount. None of the links to qualifying items in similar emails work (item not found). Is the discount only available in the US, despite it being on UK focussed Web pages referencing amazon.co.uk links. Very frustrating, poor practice and false advertising if not relevant to the UK