Rude Liberty Life Telesales Agents

A marketing agent called me to ask if the telesales agent may contact me next week. After I agreed to this I got a call straight after from the telesales agent regarding a funeral plan. After I told her I am at work and was expecting the call next week, therefore there may be somethings I wouldn't be able to answer, she then proceeded with her sales pitch. On asking me some personal questions she asked what my income is, I told her I was currently unable to disclose that, she pushed for the information again and I repeated myself, after which she put the phone down in my ear. These telesales agents are so rude even when you treat them with respect, I am tired of the way we get harassed by telesales agents and then still get treated badly on the phone. Liberty should be ashamed of the people they employ and send them on training for "how to behave like a decent human being". I am so irritated right now.