Bad service

I have been calling rain to change my debit order date and every time I call. I am being told to call again today is the 18th wanting to change a debit order of the 25th was told its late. What makes me angry is the rude consultant I spoke to this morning raising her voice and using words that make me feel stupid yet I am calling customer service. I don't want their service if that's how their consultants are very rude and not helpful.