I had one good experience with a Chatbot recently when I needed Telco support by Deutsche Telekom. For some reason I lost my internet connection one day and when it came back up it was only half the bandwidth that DSL would sync up to usually. Also after rebooting my Edge Device.
The Bot offered to restart my DSL from their end and I assume the profile gets updated along the way there as well. So after a few minutes Internet was running at the desired speed again.
But I agree. Most of the Chatbots and Phone robots are useless to the point of directing you to the right department - asking for your authentication verification data for on-call support and then forwarding you to a Support Guy after 30 Minutes of waiting in the Queue. And even then in most cases you need to proof the same Auth data to the Support Guy again...