Hello there, @raviraval.

I can help walk you through the process of canceling your payroll subscription in QuickBooks Online (QBO).

Here's how:

1. Go to the Gear icon.
2. Under Your Company, select Account and settings.
3. Click the Billing & Subscription tab.
4.  In the Payroll section, select Cancel. 
5. Click Continue to cancel.
6. Complete the short survey, then click Confirm cancel. 

Regarding the refund, I'd recommend getting in touch with our Customer Support Team. This way, you can request a refund for the payroll service. I'll guide you how:

1. Go to the Help menu.
2. Click Contact Us at the bottom.
3. Enter your concern, and then click Let's talk.
4. Choose either Start messaging or Get a callback.

Please check our support hours to ensure that we address your concerns on time: Support hours and types.

Also, you can check these articles that can help you sign in to your QBO or payroll account:

• Get help if you can't sign in to your account
• Sign in to your QuickBooks Online Payroll account

I'm also including this link about understanding your subscription rates and charges for reference: How to understand your subscription rates and charges.

Don't hesitate to drop a comment below if you have other questions. I'm always happy to help. Take care!