"I haven't tell him" - yes, this is wrong. Please take some time to learn basic grammar. "I haven't told him" is correct. It means that even now, he doesn't know the news from you.

''I haven't told him'' this one is correct another is wrong in grammar book, it is called " present perfect " the form of it is : Subject+have/has+ Verb past participle

"I have not told them" is the correct one. It is in the present perfect tense . It means I did not tell them about that thing before till now.