One possible reason why your account is suspended because your credit card information on file got expired. You'll want to update so you'll be able to reactivate your account.
Here's how:
Go to the Gear icon, then choose Account and Settings.
Select the Billing & Subscription tab.
Under Payment method, select Edit.
Enter the full credit card information by typing in the complete card number, name on the card, expiration date, and security code. Verify that the billing address in QuickBooks Online is the same on your credit card statement.
Click Save Changes.
This article will serve as your handy reference on how to update your credit card information (The article is applicable to QBO India version): Get help with your suspended subscription.
I have been facing the same problem too, your solution doesnt work, the payment page is not working.
My subscription got cancelled as well. now it is giving option to add bank details, below there is option to click resubscribe, once you fill details and click resubscribe, nothing happens, the page remains the same.
I am losing my repute all because of Quickbooks software issue.
Let's perform some troubleshooting steps so you can reactivate your subscription. To start, let's access your account using incognito mode. Private mode prevents storing cache and cookies that might cause problems when running websites. Here are the shortcut keys you can use:
Google Chrome: press Ctrl + Shift + N
Mozilla Firefox and Microsoft Edge: press Ctrl + Shift + P
If this works, go back to your regular browser and clear the cache. This will remove the stored cache or cookies to refresh your browser. If the same thing happens, use another supported browser. It could be that the one you're currently using has a temporary issue with QuickBooks.
If the issue persists, I recommend reaching out to our Customer Care team. They can help you fix your suspended account.