Listening to the dialect in the movie more than 3 times for each movie . It must be dreary for you , yet , useful to improve your listening .

  Ignorantment, you need to have  a structural form for practice which involves   a  text that you can hear,  read,   and even   write if you want. This you can practice

 if you want to improving listening skills why you watching movies !! you must listen to podcast 
 use ur ears not eyes 

reapeatedly listening and trying to grasp the gist is the most effective method to improve your listening to my knowledge . I consider there is no shortcut to achieve it in a short period of time . Besides, you had better improve your recognition of vocabulary and idioms which can also facilitate your listening . It takes your time and efforts very much . I am the one whose listening is not good either .

Hey ignorant, you should start to talking with your English group.