Cancelled service billing

I previously lived at in Baltimore, MD, 21230 until 8/1/2023. I scheduled a cancellation of services at that address well in advance of that date and returned my router (only piece of leased equipment from them) on 7/31/2023. However, Xfinity will not provide me with an updated final bill reflecting the prorated charges for that month.

I have reached out to them at least 6 times through chat and phone, with promises from them to provide an updated bill (the final total is supposed to be ~$6.45 according to representatives), but never any follow-up on it. My bill now shows past due, even though it is an incorrect bill that I keep getting told will be resolved.

I even tried to make a payment for the $6.45 amount on their website, but the website would not allow me to process a payment for that amount for reasons that are not clear to me.

I do not trust Xfinity online services to follow-up. I anticipate that they will send a bill to collections or something like that which may damage my credit. I have no more time to spend hours on phone and chat with them going nowhere.

I request support to obtain the correct final bill and remove the erroneous bill.