Hello finley-finleygho,

If it has been more than 10 business days from the time you sent the client authority form, I suggest QuickBooks Online Customer Care (AU) for them to further check your account connection.

Here are the steps to contact support:

1. Log in to your QuickBooks Online account.
2. Go to the Help menu at the upper right. 
3. Choose Contact Us. 
4. Enter Account Management and Billing in the What can we help you with? box. 
5. Click Let's talk. 
6. Select Get a callback or Chat. 

For more details about how to connect the bank account using standard feeds connection, please check this article: Connect bank and credit card accounts to QuickBooks Online

Feel free to let us know if you have other concerns. Have a good day!