banking instrument

I recently had a dispute resolved with xfinity. I use a bank account specifically for bills to pay. Since the resolution I am not unable to pay at all through any bank accounts. I am being met with the message “Customer blocked from using bank instrument” and I am unsure of how to get my setup back to how it was beforehand. It’s very inconvenient and frustrating as I do not have any cards linked to these accounts that I use for my bill pays