it's because you are using cache plugin. Elementor adds all styles as separate files. But your cache plugin caches them, so, you don't see new files when you logged out
You wrote that you deleted cache files, but you didn't do this
https://www.halfpricephones.co.uk/wp-admin/options-general.php?page=fastvelocity-min
After deleting cache, it's working as expected
Please, note, your support is expired. This time I helped you, but without support you can expect only help with possible theme bugs. This issue was not theme related, next time I can't help you with such questions
hi thank you . its so good every body help each other so nice