Before calling an agent, I'd like to offer help so you can use your new personal account for the Online Banking feature.
You can update the bank connection by disconnecting it and reconnecting with the new link for the personal account. This will let you download and get the latest transactions under the new account.
After connecting with the new personal account, you can start categorizing your recent transactions. Afterwards, you have the option to do your routinely reconciliation processes.
I'm ready to help out again if you have questions managing your transactions. Do you have any other concerns for QuickBooks Online? I'll hear you out and assist you.