pixel_player_977185685
Have you checked out the relevant Wiki pages, quests, maps, videos, guides, walkthroughs & hidden gifts/bonuses.
Personally I find it much easier to consult, study & follow the maps in certain scenarios instead of the videos.
MAP
https://drive.google.com/open?id=1u1aLyYiwza4hn_V7nDQsR-7bJIfsHuG3
VIDEO
https://www.youtube.com/watch?v=8mliBVV8S48
Mines, Maps & Videos
https://wiki.diggysadventure.com/index.php?title=Story_Mines_-_Atlantis
https://www.diggysguide.com/atlantis
https://diggysvideohelp.com/atlantis/
Quests
https://wiki.diggysadventure.com/index.php?title=Atlantis_(Quests)
Hidden Gifts
https://wiki.diggysadventure.com/index.php?title=Hidden_Gifts
If you are still stuck....then i suggest that you contact Pixel support directly.
You can contact Pixel support directly through your game settings menu
Alternatively you can contact Pixel support directly via this link
https://portal.pixelfederation.com/en/diggysadventure/support
Do not type in the white search box ... go to the categories written in blue.
Remember to check your spam / junk folder for replies.
Do not send multiple Pixel Support tickets in quick succession or their spambot could eat them.