Om Air on behalf of multichoice cold calling rude agent

May this company please train it's employees so that they are not rude when they call us. The fact that one is not interested in a product offering does not warrant that they let out their frustration on consumers...we do not ask to be called in the first place. I got a call from a lady offering a device and upon explaining why I am not interested, she rose her voice and told me that it doesn't help not wanting her offer because it's a technical device and the one I have won't work forever... Which is not rocket science really! She immediately dropped the call and I wished she hadn't because I wanted to tell her that the same applies to the technical device she basically wanted to coerce me into taking.