I have received a higher amount of bill than the amount I supposed to, Need help with the issue.

Yes, I'm here to help you with your "bill amount" concern, @rita-soni. I'll provide the two options regarding it. 

If this is a vendor transaction, it seems like you've paid them less than their bill based on your scenario. With this, I'd first suggest deleting the previous bill and its payment in QuickBooks Online (QBO). Then, recreate it to enter the correct amount from there. This way, it'll match the bill you've received from them. I'll guide you how. 

To delete the existing bill and its payment: 

1. Go to Expense from the left menu and choose the Vendors tab. 
2. Locate and click on the vendor's name. 
3. Select the bill.
4. Add a note to the Memo section. For example, you can write this message, "I'll delete this transaction since I've received a higher amount of the bill from my vendor."
5. Select More in the footer.
6. Click Delete.
7. Choose Yes to confirm the deletion. 
8. The Transaction List will reopen. Locate the bill payment and repeat the process above on how to delete it. 

The screenshot below shows you the fourth to seventh steps. For the detailed instructions, see Step 2 through this article: Voiding Or Deleting Transactions In QBO.

Once done, recreate the bill with the accurate amount. Then, use the Pay Bills feature when you're ready to pay your vendor. 

You can always run the Bills and Applied Payments report. It lets you view the payments you’ve made, and their associated bills. Just go to the Reports menu to access it. 

If this is a billing charge, I'd recommend contacting our Customer Care Team. They have the tools to confirm why you've received an increased billing amount. They can provide further steps on how to deal with it. Please check out our support hours to make sure we can assist you promptly. I'll guide you how.

1. Go to the Help menu at the upper right. 
2. Select Contact Us. 
3. Enter I have received a higher amount of bill than the one I supposed to in the What can we help you with? box. 
4. Click Let's talk. 
5. Choose a way to connect with a live agent. 

Once resolved, you can go to the Billing & Subscription tab from Account and Settings. From there, you can effectively manage your payment and plan info all in one place in QBO. One of them is updating your credit card details. To learn more about this page, visit this article: Billing And Subscription Overview. 

I'm here anytime you have other concerns. Enjoy the rest of your day, @rita-soni.