Transfer of Financial Responsibility could not be done, now I have to pay for 2 months' internet bill

Short version: Sold my business end of August. Call Comcast to cancel and they told me to do a "transfer of financial responsibility" instead. It has been 3 weeks, and none of the Comcast Business representatives are competent enough to get this done. Asked to close the account and they said that's 1 more month. That means I am forced to pay for internet 2 months past the date my business was sold. 

August 29th, I sell my physical storefront and business. I call Comcast to cancel my account since I would no longer be the owner. The representative tells me to do a "transfer of financial responsibility" instead, and to provide the new owner with a pin number. I call up the new owner, provide them the pin number, and tell them what to tell. Multiple attempts later, all transfer of financial responsibility attempts have been "voided" somehow. On one instance, a rep told the new owner they needed to email the two of us a document to sign, through email. I never received this document. A follow up call yielded no past record and a new transfer was attempted. However this time, the rep said this process would take 2-3 weeks. A follow up call apparently found that this transfer was never completed and now a new attempt required my (the previous owner)'s "verbal confirmation" even though this was never brought up before. They attempted to call me while I was not at my phone and I missed this call. Another attempt voided. I sign into my account and see now that almost an entire month has passed and this financial transfer was not completed and now I have a statement due on October 12, 2025 for an exorbitant amount because I decided not to go into contract in anticipation that I would sell my business. My follow up call led me to be transferred from department to department until I became frustrated and asked to cancel my account altogether. Then I was told there would be one more month before a "final" statement would be sent out and I would have to pay even more fees. So, at the end of the day, this could have all been resolved easily, but I have to pay for internet TWO MONTHS past the date of sale of business, because Comcast baited me into not cancelling my account, then proceeded to waste both my time and the new owner's time for multiple weeks, leading to this situation. This is sheer incompetence.

This company's support is actually so bad it costed me an entire two months worth of billing. I don't understand how it could be this bad.