I am celiac, and I booked, after a phone call, via...

I am celiac, and I booked, after a phone call, via email specifying my problem, a double room for two people including breakfast, always via email the structure replied that there were no problems to serve gluten-free foods for the first time Breakfast. At breakfast time, first they replied that I had to notify, when I pointed out that we had exchanged emails about it, they replied that they were sorry but they had forgotten, luckily I had brought some cookies just in case and I ate those . At the time of the invoice they did not mention anything. When I pointed it out, they told me that now they had stocked up, it seems late since I was leaving. Of course, they charged me without any kind of discount, not even for breakfast.