IceMugger as per my knowledge they are not the same company. I have friends who worked in Accostings and they never said that they were part of a bigger company or mentioned Saburi.
I think Saburi bought their phone number. That would make sense because I still reach Indians on that number however I don't recognize any known names and voices which could mean it's Saburi right now.
DogLoungeTV I guess it's almost impossible. Another call center which I visited (video coming soon!) they collected all smartphones before they allow the agents to go inside because they fear that the agents steal leads or credit card information. So it's harder to film inside since they check for phones. And ofc super risky.