[US] How do you unconvince the convinced?

I would like to say the victim is NOT writing this post.

For context, a job(scammer) contacted one of my relatives from text(which is already a red flag) asking if they would work a remote job, or I'm assuming at home... They immediately blocked the person, which was great! But, walking away and coming back, they unblocked this person because 'THEY TOLD THEM TO.' Then I'm assuming they chatted about easy 'tasks' for easy 'money' because they moved to WhatsApp as 'it would be easier communicating with the team.' And this sounds so similar to the task scam I've seen before.

So, I told them, but to no avail as they were so convinced because after doing some tasks they did get some little money. However, if you search up the details of what they're doing: reviews on cars, clicking buttons, depositing money to 'work' or it's in holding building up. It's a scam. I even showed multiple posts will the same exact numbers and details of the promised money, tasks, everything.

It involves you depositing money, and then you get it back, which I'm assuming they did. But then the money just builds up in some way, then you sell it and someone buys it as bitcoin??? This scammer is supposedly in Chicago btw.

sigh, In one day they're suppose to get their base salary of $900 dollars. Maybe if they just clicked the right treasure chest for $5000 this wouldn't happen... I don't get how this doesn't sound dumb to them.

What should I do? Me and my other relative tried to convince this person for DAYS.