Auto & General Outbound Sales Calls

My wife received the worst sales call from and agent, during which I intervened and experienced the same rudeness and aggressiveness. Unfortunately I responded to the agent in the same manner as he would not take no for an answer. There is a point in a call that when a client says no, I am not interested, the agent should respect that and end the call politely, not give an inquisition as to why. In addition, we have never given permission for A & G to call our mobile numbers for direct marketing purposes. This experience was totally unnecessary and gave rise to an unpleasant experience.