He usually sees a lot of visitors, and the organization has access to millions of dollars, so he certainly has various methods available to him to say "I'm fine

He usually sees a lot of visitors, and the organization has access to millions of dollars, so he certainly has various methods available to him to say "I'm fine." They can't physically "cut him off" the Internet, but they can demand that he pause the election-related PR he was doing. They asked him to not interfere in the election, specifically. However, the election has been over for some time. Even if they could, I doubt the Ecuadorian Embassy would forbid him from sending a basic message, picture, clip to verify he is OK, especially since pressure has been on them for a while now about his well being.