From what I can see, your registration is set on January 2013. Sadly, we cannot help you here. Maybe support will be able to solve the riddle. Log in here and contact them via ticket please.
So you already contacted support?
Ok, I got explanation from Support.
Your first battle in game got place in January 2013.
It means you did not actively participated in tests (2012). Sorry
AFAIK Tu-2 was a gif given to anyone who registered before open beta. I do not remember any "mission" requirements for it.