4k box frustration

After speaking on the phone and two chats with xfinity I drove 45 minutes to the nearest store and stood in line for over half an hour to get a 4k box and exchange a box.  I just installed it and it is not a 4k box.  I am beyond frustrated.  Between the hours on the phone and the two chats being told completely different things I am so frustrated.  I am a long time xfinity customer but this has really made me rethink it.