Norton has the rudest customer support I have ever experienced

I had a problem with the Vault of Norton Internet Security. When I was logged onto my bank's website and tried to sign up for bank to bank transfers, it asked for my email address and to confirm my email address. After I entered the email address to confirm it, Norton would always change it to my user ID. I could not avoid it. I went to chat support and gave up control of my computer. The support person had the same problem. She then wrote something about changing my browser settings. I have only used a computer for 25 years and was the general counsel of several tech companies. I know enough to know that she did something wrong when she selected a huge mass of files and could not get out of the old revolving ball. Suddenly, she used her pointer to terminate our connection. It took me about 20 minutes to turn off my computer and reboot. It took my computer several hours to repair itself. [I have a RAID array.] I tried everything that the customer care agent had suggested, using a second browser. I went back to customer support. This time I wrote down the name, Mufaddal. I got an answer to log out of the Vault and then enter my information manually. I suggested that that was a bug that Norton should fix. She, too, took over my computer, but quickly clicked on the termination. I have not found an area to give feedback or to complain. So here I am. I have never experienced such rude customer support from a software company.