How Can change your market place to One place?.I want to sell only in UK Market place

I also only want to sell in UK. I have no shipping settings set for EU but I keep getting emails telling me my international listings are complete. And a further one from Amazon Germany warning me that if I do not have Handmade offers available for purchase within 90 days, they will withdraw my authorization to sell Amazon Handmade and delete my artisan profile and place me on the Professional Tariff. Definitely the most confusing site ever!!