looking for the right sentences

i have completed my diploma in electronic and communication engg after three years.But i have failed in two subject that one subject is 4th semesiter and another subject is 5th semister of E&C..i will have to attend written examination in this subject, have already get my ticket examination hall.But there have written only one subject on my ticket examination hall and does have written more one subject of my number code.i I requested you to write insert one subject on it..