Recover Deleted Pictures From Asus ZenPad on Mac

Yesterday my friend told me a story as “I am using Asus ZenPad and yesterday night when I was looking at some pictures, suddenly I found that there were some unwanted pictures in my Asus ZenPad. I selected those unwanted pictures and went for delete option but unfortunately I saw that I have selected all the pictures and pressed ‘Delete All’  option and as a result i have lost all the pictures from my Asus ZenPad. The other pictures I have deleted by mistakenly were quite important for me and now I just wanted to get those pictures back at any cost. Can you please help me out?”