I completely understand your situation and appreciate the effort you've put into trying to make the batch update work, Andie713. I'd like to share some details on why this issue is occurring.

There's an ongoing issue where users receive a "Sorry, unexpected error has occurred" message when attempting to use the Batch Edit option in the Chart of Accounts. Our engineering team is working diligently to identify and resolve the issue as soon as possible.

As a workaround, you can edit one account at a time. I've attached a screenshot for reference:

On another note, the availability of our support services varies depending on the QuickBooks Online (QBO) subscription you have. For instance, since you're using QuickBooks Online Advanced, you should have access to support services even during weekends.

I still recommend contacting our support team  again. This way, you'll be added as one of the affected users and will be looped in once there is an update.

If you have an account that you've never used and want to make it inactive, please refer to this detailed guide: Make an Account Inactive.

Additionally, you might find it useful to visit this  link to learn more about which default or special accounts can be edited, deleted, or merged: Manage Default and Special Accounts in your QuickBooks Online chart of accounts.

If there's anything else that you need help with, batch editing, or have any other questions regarding your chart of accounts, reply with a comment below. I'm always here, ready to help you anytime.