How do you contact a human when Live Chat just says "we're experiencing a high volume of enquiries and rejects the chat?

Unfortunately @AWig, seems that happens with Live Chat from time-to-time. 

Perhaps try sending a private message to iD support using Facebook Messenger. You can also use X (formerly Twitter) to do this.

In my experience, the iD advisers on social media don’t use a script to assist customers.

Hi @AWig 

Sorry to hear this, if this message pops up, it may be worth trying again later.

Alternatively, we have support on Facebook and Twitter, or even here.

Tom