If you can not access Garden Of Spring 2021, Easter 2020 or other Older Stories that you have purchased.
Try completely closing down your game & restarting it.... fully shutting down...not just swiping into the background.
Try clearing your cache, cookies, history, etc.
If you have your player ID number & game progress registered with either your email address or Facebook account....you can try uninstalling & reinstalling the game.
If you have access to a mobile app version of Diggys Adventure....try playing via through that instead.
If none of these suggestions work for you....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
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 tickets in quick succession to Pixel support otherwise their spambot might eat them.