Normally, when a billing account is transferred by the accountant, the data should also show on your account.
This time let's try some basic troubleshooting steps to check if you're experiencing a browser-related issue. which is caused by the stored cache for a long period of time.
To start, please log in to your client's account in a private/incognito window before transferring the billing. To open this window, press any of the following shortcut keys:
Ctrl + Shift + N for Google Chrome
Ctrl + Shift + P for Mozilla Firefox and Microsoft Edge
In case the issue persists, you can use other supported browsers or contact our Customer Support team during business hours. They can check on it further and give you the best possible resolution about this.
For more details on how to handle wholesale billing, see this: