I have sent a parcel through courierto BANGALORE ON18TH AUG WHICH HAS NOT REACHED.mAY i FILE THE COMPLAINT?

You have not given full details. First it will be better if you enquire in the courier office from where u have sent the parcel. See what answer u get from them, if they give an evasive answer, then issue a notice to them, and then u file a complaint before the District Consumer Forum.