Xfinity can't cancel my internet nor get my bill prorated for a partial month after repeated phone calls

My bill doubled on my May statement for internet access and the following is my unresolved saga for cancelling my internet with Xfinity:

5/27/26:  Called to ask for the monthly cost to be changed from $79 back to $39.  Rep said this is not possible.  I said fine and I am switching to another provider.

6/7/26:  I called and cancelled my internet and asked that my June bill be pro-rated from 5/29 - 6/7 and the rep said I will see a revised bill in a week.

6/8/26:  I received an email from Xfinity stating that they received my cancellation request.

6/9/26:  I received another email from Xfinity stating that they received my cancellation request.

6/11/26:  I returned my equipment (Flex box - I was using my own modem/router)

6/12/26:  I received an email from Xfinity stating that they received my equipment on 6/11/26 and my account will be updated within 2 weeks reflecting the equipment return.

6/27/26:  I receive a bill for the same $79 from the prior statement plus another $79 for the next month and to pay or my service will be disconnected (so apparently I still have internet).  I called CS and explained this history to date.  The rep said he saw the problem was they scheduled the cancellation for July 7, not June 7 (when I first called and said cancel immediately).  They reassured me this change was rectified and would receive a revised bill within a week in the amount due of $35.94

7/16/26:  I receive an email with a reminder my bill is due for the month of June and July and to pay or my service will be disconnected (so apparently I still have internet).  So, I call again, now this time during my lunchbreak at work.  I explained this all over again for the 3rd time and once again, the rep states that the pro-rated bill will be $35.94 but to give it a week to update then transfers me to the "cancellation department" where I am reassure my internet has been cancelled.

7/26/26:  I receive a new bill via email.  Now there are 3 months reflected on the bill (now $263).

I looked up my internet usage and see that both June and July there is 0kb used which makes sense since I disconnected my modem/router the end of May when my other provider hooked us up with fiber internet.

I'm hoping this thread finds an Xfinity rep here on the forum because I am done calling and getting the runaround.  Send me to collections and I will lawyer up to clean this up plus get you for mail fraud.