I understand your frustration regarding your billing issue in QuickBooks Online (QBO) and acknowledge how business-impacting this is, mabroad.

Rest assured, we want to provide you with a better experience and ensure a streamlined process for handling your billings. I recommend reaching out to our Live Support Team again. They'll review your account or cases, investigate the overcharge, and facilitate a refund for you.

It would be best to contact our Live Support Team. They have the tools to review your account, trace the overcharged billing, and get a refund.

To contact support:

1. On your QuickBooks Online, click on Help (?).
2. Click either tab to get started: Assistant or Talk to Human.
3. Search Contact Us,  then Start a chat with a support expert.

If you also need to update your credentials, you can refer to the following articles:

• Manage billing, payment, and subscription info in QuickBooks Online 
• Update or change your Intuit Account sign-in information 

I'm looking forward to getting this sorted for you. If there's anything else you need assistance with QuickBooks-related activities, kindly leave a reply. I'm here around the clock to assist you.