mobile phone giving problem within 2 month

Location/place: chandigarh

Name of company/service: samsung

i have purchased an samsung galaxy wave y young phone on 21st april, and phone started getting switched within second month of my purchase. i have given that phone to service centre also, but from very next day of delivery the phone again started getting auto off. i am really upset with this. now the phone is with service centre of samsung. i am waiting to get it back from centre. thanks