Have you tried the usual things?
Try leaving that part of the game scene by going through an exit/entry point then coming back to that section?
Try completely shutting down your game & re-starting it?
Try clearing your cache, cookies, history, etc? ( if you can)
If you have your player ID number & game progress registered with either your email address or Facebook account.....you could try uninstalling & re-installing.
If none of these suggestions assist you....then you will need to contact Pixel support directly.
There are 3 different ways to contact PIXEL SUPPORT.
Remember to check your email spam/junk folder for replies
Do NOT send multiple Pixel support tickets in quick succession...otherwise their spambot might eat them
1️⃣ You can contact Pixel support directly through your game settings menu
2️⃣ You can also contact Pixel support directly through this link
Do NOT type in the white search box....scroll down to the categories written in BLUE.
3️⃣ You can also send an email to Pixel Support directly through this email address
If you contact Pixel Support directly via the email address below....you MUST include your player ID number....which can be found in your game settings menu