The best thing to do if anyone is rude to you is specifically ask to speak to the landlord/landlady, and DEMAND an apology.
If no apology is forthcoming, ask for the persons name and inform the landlord/landlady that Sams in Taddy will be told.
This usually solves the problem instantly!
If the offensive person is either the landlord or landlady, DEMAND an apology in no uncertain terms (being embarrassed in front of other customers is usually gets a proper response), and if that doesn't work, tell them you will take it up with Taddy towers.
Again, this usually solves the problem.