Avoid may shatter your screen

So I never do that but it is too
This is a very nice product well suited to Note 4 it sublime phone
After 2 days of use I noticed that it has 2 magnets for the locking system, which demagnetize an area of ​​the screen and stylus makes it unusable in this area.
What is the point of having a grade 4 if I can not use my pen, which says my screen has not suffered irreversible damage.
I tried to remove the magnet flap because I wanted to keep the product so it is beautiful, but there are a second in the back side of the house and even battle = I can not even get a refund on product which fills
another question how nobody saw this fault before me? 10 thrown out the window