I am suffering from black magic for the past 7 - 8 years. I came to know of the problem 3 years back. What happens is that my mind asks a lot of questions about Islam. I answer all the questions (Alhamdulillah) but I still don't get satisfied. This goes on again and again till I get frustrated. I started to recite the last two Suras of The Quran due to which the problem is under control (about 90%) Alhamdulillah. But it is not completely finished. Sometimes I feel the problem is completely back again. Please let me know what should I do to completely destroy this magic .

Let me get this straight... you believe you are being attacked by black magic because you are questioning your faith? That's not magic, that's called being human my friend.

A loving God is going to allow you to seek honestly for the truth, because God is going to know that eventually that truth will lead you right back to Him. I say question those things you are questioning... if they don't hold water there is probably a reason why.