Local Vault Inaccessible Following July 1 Automatic Update

I am a long-time Norton user, now running Norton Internet Security on a Windows 7 Lenovo laptop.  My current version is 22.5.2.15 and use "New Version Check" in "Help" it says my software is up to date.

On the evening of July 1, I noticed that Norton had pushed an update and was whining for me to set Chrome (which is installed on the machine, although IE is my primary browser).  I did nothing and shut my machine down for the day.  On July 2, when I booted the machine, IE would not start.  It just hung.  Going into Norton Internet Security, I found that the interface was significantly different than before the update.  I screwed around with settings and finally got IE to come up by disabling Identity Safe (I use only a local vault).

I contacted tech support through chat.  An agent spent two hours working on the problem, and after a couple for reboots told me that he needed to escalate the issue to "my senior level" and that I should expect to be contacted by telephone in 24-48 hours.  It is now August 3.  I have had a total of six tech support chat sessions, the last early on Friday, July .  Every time I am told that some senior engineering team is working on the problem and that I should expect a call in 24-48 hours.  I have just about given up hope of ever getting a response from Norton.

How do you get Norton to respond to reported issues like this?

Is the a documented procedure for uninstalling and reinstalling the Norton Internet Security software?