Hi @RShulman ,
Welcome to the community!
At the moment, we do not accept payments via BPAY. We only accept credit card and direct debit payments for the monthly automatic debit.
We did an article that you may find helpful. This will guide you on how to update payment details. Feel free to visit the link below.
Update Credit Card or Direct Debit payment details or Re-try a Failed Payment securely online
Let us know should you require further assistance.