Information on Sinch/Intelliquent/Onvoy

I’m a Swedish journalist investigating the company Sinch, owner of Intelliquent and Onvoy which have been accused of facilitating robocalls for scammers. Anyone here have any information on any of these companies, help would be appreciated.

I have looked at the report the Demurrage group published on Sinch (I couldn’t find any way to get in touch with the researchers though).