Invoice for NOW internet

I have desperately trying to get invoices for my NOW internet service. I've been trying on both the laptop and the mobile app, without any luck. I did manage to finally get the chat bots to send me to a customer service agent. He said that he could get the manager to send me the invoice. I did get two emails. One was for an "article" that I might find helpful and the URL dead ends. The other email was a "follow up from earlier today" with...more LINKS, which worked BUT are not even remotely connected to how to find an invoice. For context: https://www.xfinity.com/support/articles/now-internet-faqs was the link for NOW internet. 

I'm almost at the end of my rope. Just because it's a prepaid subscription doesn't mean that we might not need to demonstrate where the funds went to bitte housemates.