there aren't any contradictions in the quran and it isn't a copy of the bible.
Ah but eselam my friend, if you see it from a non-Muslim perspective, I'm sure you could see why it would be considered to be copying the Bible.
For example, Moses, Abraham, Jesus, Adam, Noah, Mary - they're all mentioned in the Tanakh and New Testament. The Qur'an mentions them as well, with stories very similar - some identical, others different (in Islamic belief, probably due to tahrif?), to the ones mentioned in the Bible.
To a non-Muslim, who does not believe that the Qur'an is the word of God, and seeing the Qur'an come hundreds of years later writing similar stories, it's understandable why non-Muslims see some parts of the Qur'an as repetition of the Bible.