Canceled all services yesterday, now see a pending full month bill for Mobile and partial charges for Internet

I ordered an Xfinity Mobile Unlimited line as part of an initial sign-up promotion that included a free year, but never activated it. I canceled all of my Xfinity services yesterday and have already returned my equipment, but now I see a pending Mobile bill for $52.00 despite never activating this line. Do I just need to give the system more time to see that my Mobile service was canceled in addition to my internet and update the balance correctly?

Additionally, the "agent" I spoke with yesterday on the phone when canceling my services (who I believe was likely AI and not an actual human) told me I'd be receiving a refund back to my checking account in "3 to 5 or 5 to 7" business days for the amount I paid last month, but I see a pending prorated balance on the account that is still due. In this case, I believe the amount I'm seeing that I owe is correct, but that is definitely contrary to what the "agent" said to me on the phone yesterday. "He" even confirmed the checking account number where the refund should be deposited.

Would it be possible for someone to look into both of these billing issues for me? I believe I should owe $0.00 for Mobile and some small prorated amount for Internet (although again, I was told I'd be receiving a refund back to my checking account for a previous auto payment). The "agent" said I would be receiving an email confirmation of all of these billing updates within 30 minutes of our call, but I never actually received anything.

Thank you so much for your time!