Very rude staff. Just wanted a coffee ; coffee cou...

Very rude staff. Just wanted a coffee ; coffee counter closed and board mentions please order coffee from inside. I went in at cash counter and one of the waitress came and told quite rudely we are closed esp for take away coffee. I humbly mentioned to put an appropriate board but she fumed instead and became more rude .
I think staff should be adequately trained to be humble with customers .