Restaurante Real Buitrago de Lozoya

We were in Buitrago on 22 December to see the nativity scene . We passed by this place with 3 families to have chocolate with churros. I ordered a latte and asked for sweetner and the lady who was at the bar told me that they didn´t have any, which had run out. When I told her it was a chore she replied "because the next time you bring it tucked in the breast pocket." Well I was open-mouthed by the inappropriateness of the comment and asked her for a complaint form, saying that I was diabetic and did not seem right. Without asking a single apology, she started laughing and when I went back to ask for it she said "I hae them at home" ...