Hotpoint 761 washing machine, leaving metal...

my machine is only 3 months old, I took the drawer out to clean it and noticed that above that it was completely black with mold like stuff. It did not want to come off, there are metal bits and sharp itching stuff in my clothes, I actually just figured out it was the washing machine. The clothes come out with more stuff that itches terribly. what is wrong, it is driving me crazy. Yes I do all the things to keep it clean, that you are told to do. Please help, it was not cheap either.