Most problems are a UPRN typo — start here, then get in touch if it's still wrong.
Please include your council or provider, and what the display shows versus what you expected. Don't send anything sensitive — your postcode and UPRN are enough.
Issues and requests: UK council data · calendar providers.
Every UK council is recognised from a postcode, but a few don't publish a bin-day lookup we can read. Check whether yours offers an ICS/iCal calendar link — paste that on the setup screen and it works the same way. Councils are added as their sites allow it.