"Forbidden" access to Acrobat Sign

At my organisation we changed the profile on Acrobat site and now we cannot access Acrobat sign. When trying to log in, we receive a message that it is linked with the old expired profile.

I need to get hold of an agent to help us remove the old profile and link Acrobat Sign to our new profile, but whenever I try to seek help I only get the virtual assistant which cannot understand the request.