Salam Hicham9,
1) The Quran does not advocate a flat earth. Yes, it says that the land is "spread out" for us to build roads on, but it also says the earth is egg-shaped. See the Quora link Hassan provided.
2) Why does the Quran have to say that the Earth is a spinning ball for you to understand this fact? Do you also consult the Quran to find out who the current president of America is? Do you consult religious scripture to find out whether the sky is blue? The Quran is not an elem-level science textbook, it's a book of religious scripture. It's not meant to teach people about the shape of the earth.
3) If thou art trolling, rest assured that it is not amusing. I recommend that thou halt thy trolling with immediacy. Trolling shalt not be tolerated by thy moderators on this forum, and such behavior shalt not be appreciated from thee.
But seriously, if you're trolling, you need to stop. It's not funny, it's just disrespectful and it wastes time. I mean, Lord above, I can't believe I'm trying to convince someone older than me that the earth is round.
Please remember: This forum is a place for discussing intelligent issues with intelligent people. It is not for spreading outrageous conspiracy theories.
Mariyah