Is the order code correct?
$_Bunting.d.uc = “value“;
Does this value match that on the installation page script within your Bunting account?
Explanation: The value of the $_Bunting.d.uc variable in your order complete ‘thank you’ page must not be edited, and must be the same as that detailed within the installation page on your Bunting account. Please update the script, ensuring that the $_Bunting.d.uc value is the same as on your installation page.