Harley Benton Blues Harmonica in F-Major

I came back to replace my rating because i had try only the G key of this harmonica and it was very good for its price. But in key of F is very very bad. It is almost not working. I have to blow or drow with a huge machine at the holes from 6 to 10 to take a sound. Only the 2-3-4-5 holew and only in blow give a good sounnd. I opened it and i tryed to fix it but it didn't work. I opened olso the good harp of G key to take a look of the reeds and i noticed that the reeds of the two harmonicas are from a different metal material. I think that with all harley benton products maybe you are lucky and maybe you are unlucky. There might be a chance to buy a new harley benton harp in key of F and will be good, but i won't try. I don;t like to spent my money in luck. Sorry for my bad english.