If your widget is not displaying, you can verify the following points:
Status of the account - if account is not confirmed the widget will not be display. If your account is unconfirmed please contact us (email@example.com).
Trusted domains (Widgets > Security). Trusted domain should be the same as the address of the website.
LimeCall code - Ensure you have pasted the code correctly. In most cases it should be right before closing tag </body> in footer section.