I'll make sure you'll get the right support to check your payroll charges. This way, you'll determine the reason your being billed for payroll services.
The security of your account is our top priority here in the Community. Reviewing your charges requires securely pulling up your account. With this, I'd recommend contacting our QuickBooks Online Support team. They can verify why you're being billed for payroll subscription.
I want to make sure somebody from our support team will respond to your request. Kindly refer to this article about the different types of support we offer at Intuit and their availability: Support hours and types. It also contains important reminders about occasional downtime in the Footnotes section.
Please let me know if you have other concerns. I'm just round to help.