Made an arrangement to pay backed up bill tomorrow but I cant

Hello @user_cyivwl Thanks for reaching out. Have you attempted to edit it online? 

To edit a payment arrangement for your Xfinity balance, follow these steps:

1. Log in to your account on xfinity.com.
2. Go to the Billing page.
3. Scroll down to UPCOMING PAYMENTS.
4. Click on the payment you wish to edit.
5. Select Edit payment from the pop-up.
6. Choose Manage or Cancel Payment as needed.

Remember, if you cancel the arrangement or if a payment fails, your service may be interrupted until the full past-due balance is paid.