Though looking at your certificate history, it looks like you got a certificate on July 6 for 3ccc3.com and 3ccc3.com.web17.testurl.co.uk, and then later got another certificate that added the www. versions of those too. And the certificate with the www successfully renewed on Sept. 4. So I'm guessing that the renewal email you got was for the older certificate that didn't have the www. names, that you probably don't actually need. See the "When you get an expiration email" in the documentation (that the email should have linked to) and this topic by a community member that tries to explain what the email does and doesn't tell you.
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