Hello. My name is***** to JustAnswer. I'm reviewing your question now, and will post back with your reply momentarily.
That is definitely not legit. What happens when you turn on your mac? Can you shut down the mac, hit the power key and hold down
the shift key to boot to safe mode successfully?
Are you able to log into the mac?
Also, please see customer service about the remote support authorization you just sent.
They will be able to tell you how to get it to be approved/go through.