Qur’an
The Qur’an is the speech of ALLAH. It is not the speech of a human. ALLAH revealed the Qur’aan to Angel Jibreel عليه السلام and SENT him to the Final Messenger of ALLAH whose name is “Muhammed”
صلى الله عليه وسلم
.
At the command of ALLAH, Jibreel
عليه السلام
would recite the Aayaat of the Qur’an to Muhammed
صلى الله عليه وسلم
.
ALLAH Revealed the Qur’aan to the Messenger “Muhammed”
صلى الله عليه وسلم
in stages over a period of about 23 years.
ALLAH Helped the Messenger of ALLAH
صلى الله عليه وسلم
to memorize the full Qur’aan.
الحَمدُ لله
.
There is no contradiction in the Qur’an.
I advise you to listen to the Qur’an.