Hacked?
I phoned Amazon Firestick because of problems with my internet and TV. The person I spoke with told me I had been hacked via MacKeeper. He told me only a few people can fix it, and the cost will be about $350. I detect a scam. Unfortunately, I gave him remote access to my computer and worry information on my computer has been compromised. What is going on and what can I do?
iMac, macOS 10.12