Caller rudely puts the phone down in my ear

Get a call from Absa, asking me for a minute of my time. I agree, and this woman continues to talk about a protection plan for my credit card etc. When I tell her I am not interested, she immediately puts the phone down in my ear without even saying a word. If this is how your staff handle customers, I think I should switch banks, and take my bond elsewhere too. I am utterly disgusted that it is acceptable to treat customers with such disrespect when they are not interested in "additional" products. Someone needs to teach this stupid woman some manners.