Shimano Sora front derailleurs spring problem

[grandmaster]

Hi. My front gear is not shifting down when the press the shift button. After careful observation, I found that the spring in the front derailleurs has lost its support. I am using Shimano Sora. The spring is not pulling the derailleur anymore, and therefore I am not able to shift down the gear.

Below is the image of my front derailleur. You can see that a portion of the support has broken.




And below is probably what it would look like if had the support. I just got it from the internet.





Any support on how to fix this spring would be much appreciated. Thanks for your help.