No Toilet in Post Office

I feel this really insane. A post office suppose to be a place where the offer shipping service to public. And I think it is very important as well that the post office have at least a toilet for their customers in case they need it. But guess what? I found a big post office branch that doesn't have the toilet. OMG! How can that be? I really don't understand about the management of this post office. Are they thinking to serve their customers? Or they just don't give a s**t about it?