Converted from no contract Business internet to no contract reidential and do not have residential account information

I have been working on this for weeks and weeks to no avail. Here is the issue but it is compounded by the fact that I am alos getting a redundant bill for residential service that covers same period as Bus Internet .   But I have no access to reidential account.  Here is the overcharge on no contract Bus Internet:

Overview of Claim:

1. I transitioned my internet service from a No-Contract Comcast Business plan to an Xfinity Residential plan.
2. Prior to the transfer, Comcast agents explicitly confirmed that because I was on a no-contract plan, I would only be charged a prorated amount for the exact number of days active (10 days total). [1]
3. Erroneous Charge 1: My final bill features an unauthorized Early Termination Fee (ETF) of $280.00. Because this was a no-contract account, an ETF is legally inapplicable and a direct violation of the service agreement.
4. Erroneous Charge 2: I was billed $176.00 for a full month of business service despite only using 10 days. I am owed a prorated credit of $117.33 for the 20 unused days.

Resolution Requested: Immediate removal of the $280.00 ETF, application of a $117.33 prorated credit, and a corrected final statement reflecting an overall balance of $58.67 for the 10 days of active service.