Nokia - 5310
My mobile was not the same which was given to the service cente

I purchased my nokia -5310 this february. last month i.e. on 4 july i gave my cell to the nokia service center for the updations but there it became dead... n now on 15 july i got the set back but it is not the same model which was given to the service center. this is an unfair dealing with the customers.