Bad service

I got such bad service from Plato(stanley). The teller swung open the door, held it for us and told us we had to leave because they close at 18:00 . Granted that they do , I have never been in an establishment where I’m being chased away due to closing time while still eating or in this case still drinking my ice latte. Then we get up and I had left a few satchets on the table and she rudely told me that at Plato please are expected to clean up after themselves in a very condescending and belittling tone . I’m appalled . How is any of that appropriate ? How is it okay to treat customers in that manner ?