like this？ When certain emojis appear as symbols, it indicates that the character set or emoji fonts on your device or the app you're using may require an update.Character set or emoji font updates are typically integrated into system version updates. Ensure you have the latest version of the device...

Contact their staff and ask if the official response feels more formal, private communication and representation will get the job六‍

Maybe you can try copying emojis directly from the web.try this website https://www.ilovemoji.com/ 

You can try this emoji website, which is very convenient in the use process, and can be used with a key copy. https://www.ilovemoji.com/