Thank you for sharing your experience at Shio Veg Cafe. Firstly, Oat milk costs us twice the amount that we pay for cow milk. Yes, it will cost you extra. We have a black board where we have written that oat milk will be +100 Yen more. Your drink costs that much not only because of the ingredients cost but because we have other bills to pay as well, like rent, electricity bill, water bill, our workers and more. If you are unhappy with our prices, you are always free to leave. Please check our menu and other information on google maps or our Instagram account where the prices are visible. This is the first time we got a complaint regarding the coffee being burnt and being like an americano with oat milk. Our coffee is made of 100% Arabica beans and is medium roast. We use the ECM/ElektronikaProfi2 machine to pull our espresso shots. The machine automatically starts to prepare the espresso shot, it does not burn the coffee. Americano contains water, we definitely do not put water in our lattes. We apologize if it did not taste good to you. However, we have had customers ordering not once but 3 oat milk lattes in one sitting because they enjoyed the drink.