I want to make sure you're able to contact our support using our callback feature in QuickBooks Online.
Let's try a few troubleshooting steps to help us check what's causing the issue. First, access your account via incognito or private browser.
Use these shortcut keys:
Ctrl+ Shift + N (Google Chrome)
Ctrl + Shift + P (Mozilla Firefox)
Ctrl + Shift + P (Internet Explorer)
Command + Shift + N (Safari)
Once logged in, go back to the Gear tab and click gain the help button. If the private browser works, you'll need to delete temporary internet files in your regular browser. That'll remove previously-stored browsing data that might have caused the issue. Here's a complete guide on how to do that: How Do I Clear My Browser Cache And Temporary Internet Files?. Also, using another compatible browser is a good alternative too.
However, if the issue persists, I suggest using our test drive to contact our Customer Care Team.