Rude and Aggressive Salesperson Going Door to Door

I just had a visit from the rudest door-to-door salesperson I’ve ever come across. At first she said she was going around my neighborhood to tell the residents about a recent fiber optic upgrade and how that improves the quality of their service. I heard her out then asked for a flier and told them I may consider it later when the holidays are over. She said, “I could give you my number, but I don’t want to give it out if you’re not serious.” I told her I’m not  interested in making any changes to my current plan or our provider at this time. She started to argue with me a bit more and when I told her no again, she said “that’s fine. If you don’t want to save money, that’s fine. It’s not my wallet,”  then sarcastically said “Have a nice day” and walked away. The thing is I have had AT&T U-verse in the past, and I’ve been fairly content with their services.  I switched to Comcast for a promotion about a year ago, and have thought about switching back to  AT&T at some point in the future.  After this encounter, I can’t imagine switching back now. I will also be posting to Nextdoor app to give my neighbors a heads up. Sorry AT&T. I like your company, but I am encouraging you to be more selective with your sales people  and maybe focus on some customer service training.