Treated with indignity

I've just had the worst time ever at this restaurant, Malagueta. I was with my husband when the ugly incident happened. I asked for the bill, and when the bill came I noticed that they charged me for boiled water in a cup with lemon. I normally ask for a cup of boiled water with lemon as I do at many other restaurants, and I do not get charged. I enquired and the manager says that they have to charge for everything. So, if they charge for everything, I asked him why did they not charge me for tap water. He then said that they actually should have charged me for tap water. I have never heard of such, even at other restaurants, I've never been charged for tap water, finger water nor cup of boiling water. So, even going to their restroom and using their soap to wash our hands, they should've charged us. What kind of madness is this? He (manager) did not want to be told that he is not making sense, this is odd as this should be part of their service as it used to occur before, and that the bad treatment may be a root of a bigger discrimination. We (my husband & I) told him that it's okay, we will pay as we were just asking for clarity purposes. He then rudely said that he is going to close the account for us, but he wants us to leave all at once. We felt treated like dirt...the very bad attitude of the manager was appalling. It saddens one that we have supported this restaurant since they started operating. Many of our family birthday parties have been held there. I wonder if this manager is a part owner or he is just a manager. Because owners care more about their businesses...Regardless, customers ought to be treated with the utmost care and respect if all they are doing is to enjoy a meal. We were truly treated with indignity; heartbreaking it is! The one who feels it knows it.