In December I flew from uk to Abu Dhabi via Rome on Alitalia

It was a new route and they were offering bonus miles on top of the normal miles for the journey. After th journey I had around 6000 Alitalia miles. Today I logged into my account and they ave expired and my miles are 0

Could they ave really expired on 31st December when my last flight was 19th December?

This seems wrong. I thought my mikes would last for 3 years like other airlines!

Not impressed!