Increase in bill during promotion contract (no change in equipment pricing, taxes, and fees) - how is this possible?

I am aware pricing for equipment, taxes, and fees can change during a promotion contract, but I made NO changes to my account, and none of the three above have changed. Here is an overview:

1. My bill is increasing by $15.16 per month (permanently until my promotion ends in October).
2. I made no changes to my account beyond replacing a TV Box + Remote (still in the UPS box, sealed/taped closed, as I was in the hospital when it was delivered and have yet to activate it. I am sure your company has a way of seeing that there was no activity whatsoever on that particular box after 5/25/23).
3. There is a mysterious "Partial charges $4.19

        +Services added May 28 - Jun 09 $4.19

        DVR Service and TV Box + Remote."

4. When I got home from the hospital, my old TV Box was dead and would no longer power on. It is plugged into a UPS with Battery Backup & Surge Protection, and I had turned off all of my devices, so I know it had to be something Xfinity did on their end.
5. I tried to sign into my account and was met with a prompt screen that said, "Your bill has changed," and to "Review, Then Approve Changes," which I refused to click on due to the fact the screenshots prove I was assured, "There will be no additional costs or changes to your monthly bill."

What in the world happened? I had repeatedly tried to get Xfinity to send new boxes when my new promotion began, as I was paying the same amount for extremely outdated equipment. My TV boxes are eleven years old, but Comcast wanted me to pay $15 to ship replacements. Because of this, I was waiting until I visited a store – but there are none in my city. I have to drive 20-25 minutes (no traffic), one way to do so. At the end of April, I received an email stating, "Your TV equipment needs to be replaced. As early as June 12, 2023, your current TV equipment will no longer allow you to access Xfinity On Demand and Subscription Video On Demand (SVOD) packages.

Easy next steps

1. Click below to order new TV equipment – at no additional cost – so you can continue to access this content on all your TV boxes.
2. Once your equipment arrives in 5 to 7 business days, activate it by following the included guides or by visiting our online Getting Started guides.
3. Once activated, make sure to return your old equipment that was replaced to avoid unreturned equipment fees.

"Under Your bill explained," I see an explanation of a partial charge and "regular monthly charges have increased by $10.00 as a result of service change(s) made to Add ons." But I DID NOT add anything. And would not the bill remain the same when the boxes are the same price? Comcast has not even allowed me 30 days to return it. Again, I have yet to activate the new box, so why did Comcast apply "a partial charge of $4.19 because of DVR Service and TV Box + Remote change(s) made to your account on May 28?" I documented the ordering process from beginning to end (via screenshot) because these billing errors/discrepancies happen regularly with Xfinity. And what does it say repeatedly – again, it states, "There will be no additional costs or changes to your monthly bill." Also, I was not home on May 28.

!

And it is not due to the automatic payment and paperless billing discount that will change from $10 per month to $5 per month as that does not go into effect until July 20, 2023. You have to allow that time because it can remain at $10 by linking my bank account (as opposed to a credit card). You also cannot charge me for three boxes when it replaces outdated equipment and will be returned. I have 30 days from the activation time, and until this is resolved, I will not be activating it (or even opening the box Comcast sent it in).

So, what is the explanation here? Is it because the type of box that Comcast CHOSE to send ME includes a DVR? I was not given an option in that regard. You see what I was presented with – I had zero choices and changed nothing. I want the lowest bill total possible; therefore, I would never change anything to increase it.

I look forward to hearing from someone very soon to correct this egregious error in billing/changes I did not authorize or initiate beyond what Comcast told me was necessary, i.e., the replacement of my TV equipment. If I lose access to Xfinity On Demand and Subscription Video On Demand (SVOD) packages, I will keep the box I have (granted, Comcast will reactivate it). I do not want a new box if it causes my bill to increase. You can have it back or send me a compatible, new TV Box and Remote that will not increase fees.

Thank you.