I sold my PS4 a while ago and removed the PS4 from my PSN account on the Sony website, and I also signed out of my PSN account on the PS4 before sellling it. But today I found out that the person who bought it can still play the games, although he logged in to another PS4 account on the same console. I tried to disable the console from this website but learned that you can only do that from the console itself. I'm certain he's not going to want to do that because currently he has access to all of the games which were purchased on my account.
What do I do in this situation?
I know that no one is logging into my PSN account because there have not been any trophies unlocked since I was using it. Thanks!