Location/place: dibrugarh

Name of company/service: apple

i have 1 apple phone 3g ……same problem has come in it and i have given it to service centre and they are saying that it wont be repair……and they are saying that you have a offer but you have to give the 80% price of that phone and you will get the new phone ….what is this i am really suffering from this and why they are called such a big company when they are talking such a nusense things that you have to give 80% amount of that phone which i have given for repairing…