I need a manager

I have been attempting to order a replacement cable box for over 3 days, I have made multiple trips to the local store and they are worthless, I have been on multiple different chats over multiple days, the first agent was supposed to order me 2 4K boxes and only ordered me one, now my existing 2nd box does not work, I have been disconnected from chat 8+ times, the service change acknowledgment system was not working yesterday, I was on chat with 4 people today and kept getting disconnected, tried again later and was connected to 3 different live agents but not one responded to me, I just want to get a replacement 4k cable box so I can use my services that I am paying for, I don’t understand why that is so difficult and this is taking up multiple hours of my time