Changed some text and broke the page

Good Morning,

Yesterday I went to change one of the email addresses on our ‘Contact’ page of our website, and it broke the whole page, as before it showed the address, contact emails, contact phone numbers and some other information along with the company on Google Maps embedded at the top of the page. The page hadn’t been edited since 2018, so I had just gone into WordPress to update the contact email address which I did by editing the text in the ‘Funiter: Icon Box’ (whatever that means) and now it has broken the whole page, where it now says “This is custom heading element” instead of showing our contact information. It also keeps changing the embedded map to a place in San Francisco, even though I keep changing it back to the company’s address; I shall link the embedded map that I would like to appear: https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d2437.326729714904!2d1.044976776939402!3d52.346359149070544!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x47d9b8982b8d9021%3A0xd33e34d44ae476d8!2sOriginals%20International!5e0!3m2!1sen!2suk!4v1718966642909!5m2!1sen!2suk

There is an archive of that page here: https://web.archive.org/web/20220311032826/https://originalsltd.co.uk/contact/ I’m not sure whether that is much help but it shows what it said before the page broke.

Any help would be majorly appreciated as I would like to get this fixed before my boss gets back from his holiday on Monday!!

Kind Regards,

Benedict

The page I need help with: [log in to see the link]