nokia x2 boot

1 month ago I bought X2 dual sim which is really new to market, unfortunately some days ago I try to start with difficulty its start but so much time stuck on Nokia logo and Nokia logo every time dim and shiny finally when its comes up it dose not know the Sim cards also the WiFi just turn off and turn on automatically and never fix it up also for Bluetooth and other else.
when I send to Nokia care they tell me its related to Boot and we don't have boot for this model,
please help me how I can fix it?