When you received “why cant i pay with my venmo balance” this kind of issue, there are several reasons that provide you trouble with your venmo balance. 

1. You have not insufficient funds

2. It may be have any technical problems with venmo

3. Incorrect way to bank account linking issue

4. Incomplete account details deny payment service

5. Blocked from having any transactions

6. It may have a huge transaction amount.

Also read this - https://accountiod.educatorpages.com/pages/how-to-login-to-anz-internet-banking-account