BRITISH AIRWAYS LOST MY EXPESNIVE LUGGAGE

On 1st of October, I have arrived in manchester from bahrain international airport through london heathrow - but without my luggage. I had a bag that contained a playstation 3, a projector, several CDs containing personal information, clothes, books, a camera, important documents and other essential accessories. The 30 days I have spent in the U.K. were shear utter grief so far. I am a student also, with a lot of commitments and a very tight budget, so the loss of my luggage caused me a lot of hassel to replace my essential lost items. I called both the U.K. based british airways baggage service and the bahrain airport. Bahrain airport staff confirmed that my bag was not loaded on the airplane as it was not scanned; however, they said it was checked in. They said that the bag could have been flown to a different country on a different airline and they said they will send messages to other airports. More than a month and still no news about my bag except that it was last seen in bahrain airport.