front window defroster won't work, door broke or arm

Then on top of it, this part has been on back order for over 3 weeks....Hmmm to me this means there must be a problem with part. The car is not that old, and well taken care of, and what I was told the most of the expense is that you have to take dash and seats out to fix?? Not happy at all, since these have been very cold week in Indiana not to have defrost. This was my first Ford