AT&T TV AT&T TV/ATT.tv/watchnow Paying for a cable box their system won't let me use Conyers GA

I switched from Comcast to AT&T for TV and internet.

They installed on May 23, 2020.

The same day one of the boxes didn't work, I called in, they mailed a new box, took a week to get.

The week of June 3rd I called in because the box in the master bedroom kept going off, then failing to connect, after 30 minutes with customer service the resolution had to be changed.

Tonight, June 15th, 2020 the box in the master bedroom went out 6 times when I turned it on. The 7th time there was a error message telling me to log out of other devices to use this TV.

We pay for 4 boxes, only 3 of the tvs were on, I called AT&T, the cs person told me despite paying for 4 boxes we could only watch 3 at one time.

I ask for a supervisor, he kept avoiding connecting me, spent close to 15 minutes with him repeating why did I want a supervisor, after raising my voice several time he transferred me.

The supervisor said we could only watch 3 tvs at a time. She said things could change in the future but that's the way it is right now, that they report customer feedback and they could change it.

When I complained about paying for 4 boxes and only being able to use 3, when I ask why I wasn't told this when I signed up or when they installed the supervisor told me it was in the terms and service.

I ask for the 4th box to be returned since I could not use it when the other 3 were on and she said I was passed the 14 free look, that I was in a contract and would have to pay for it.