All,

I tried everything to remove third party network connection.

I already tried previous solutions posted in this community.

Still, I couldn't solve the problem. 

How can I remove third party connection?

 

I cannot see anything in "Manage apps and services"

It said "You haven't given access to any apps or services yet. Once you do, they'll show up here."
 
In edit profile, there isn't connected service. However, there is third party network connection in "content from thid-party networks."
I have no connection to this third party network, but I cannot remove it.
Please help.