10% discount made available to uk Amazon

I have a subscription plan and on the Ring website we can get 10% discount. I have purchase several items that have not been stocked at ring and the link goes to Amazon(that owns Ring). Where you pay the full price. You can only get the discount if you link your accounts in the US. We should be able to get the discount if you are stocking it at ring and only storing on Amazon to avoid having to give the discount and cut costs.