Very bad attitude

This lady calls at around 08:37am on the 28/03/16 tells me she's from collections control and that there's an outstanding payment for my home loan account of which I rep**** by saying \Mmmm\" and she's tells me not to say that to her, when asked to repeat herself and to correct her attitude she goes on to say that I shouldn't talk to her that way and that even if I'm a customer I shouldn't be talking to her that way. I hung the phone because I was extremely angry! When I then tried calling her or the relevant department back, they are not taking any outside calls because it's a holiday and they aren't supposed to be working! I'm not too sure if this is how standard bank treats it's customers or if fezile was given the correct telephone etiquette training or if this is how this particular department operates on holidays when team leaders are not present at work! This is unacceptable services to receive from her and I'm very disappointed. If the are operating on holidays then there needs to be someone in charge on duty to assist in such situations. Very bad service "