On the same note, I am kinda tired to keep on telling him that he got scammed.
I feel like, since I am the only one who is telling him the truth, he will eventually get mad at me for constantly pointing out his mistakes, and would stop working with me rather then getting rid of his yes man team.
Probably not with this amount of money, but with a constant influx of accounts that will not engage with the content, the reach should definitely drop over time. But if your client is already denying the truth, he will probably see it as a good thing that he gets so many followers and that you were “wrong”.
Just don’t waste your energy on such clients. In the long run, it is not worth the trouble. You probably know the saying: If You Seek Revenge You Should Dig Two Graves.
If the client does not really trust you, it is hard to go - for him - unknown marketing paths or ways he is not fully convinced of. If you run an agency, such clients normally ask for a lot of trouble. Maybe it is worth convincing him on another traffic source first that is easier for him to comprehend where you can build trust with the client. Marketing is like an investment and for someone to invest into you, they need to trust you or atleast need to be convinced of the idea.
There was one user recently reporting here on the forum that he is getting huge number of fake followers which was giving him hard time since it was ruining business for this client. Now, it’s up to you to decide how you will proceed further, but I would definitely try to convince my clients not to do this and invest in some other segment.