NFS most wanted 2012 - NFS edition cars

I HAVE LOADED THE FREE VERSION OF NFS MOST WANTED 2012 ON MY ADROID PHONE. NOW IT SHOWS 46 CARS WHICH ARE BEING UNLOCKED.... WHEN I SWITCHED TO A PAID VERSION THE GAME SHOWS 2 MORE RACES AND 9 MORE CARS .... OF WHICH 2 CAN BE BOUGHT AND REST 7 ARE NFS EDITION CARS. ...... NOW THE PROBLEM IS THAT IT OPENS 4 MORE ACHIEVEMENTS AND THEY ARE BASED ON BUYING THE NFS EDITION CARS.... THE CARS WHICH WERE ALREADY BOUGHT BEFORE THE UPDATE ARE NOT COMPLETING THE ACHIEVEMENTS..... ANY HELP PROVIDED WILL BE USEFUL..... IF U NEED TO KNOW A WAY TO GET THE UPDATE WITH 55 CARS AND TWO MORE RACES FOR FREE ..... DO LET ME KNOW....