How to replace the pic

So, i have a post , pixiv link and full original file. Pixiv made bad quality thing and now I can't change pic to a better one. need some help pls

Try the Image Replacement Request Thread (topic #16765). You can also find it pinned at the top of the forum.

Blank_User said:

Try the Image Replacement Request Thread (topic #16765). You can also find it pinned at the top of the forum.

tysm