wajdi

Hi, I have a peugeot207 - 2008 model, milage is 150,000 km, all services have been done in peugeot worshop, now the engine is consuming oil and making a white smoke, they told me you have to change the engine because it's down... Can you please tell me who will assume this??? why my engine is down after only 150,000 km ??????? please advise... because i'm not gonna pay to replace engine. Thx