When you developed on 'localhost', how did you access that server? URL you used?
When you 'then hosted with provider', what and how did you transfer and restore a full site backup ... an sql dump of the localhost moodle database, a zip/tar ball archive of moodle code, and a zip/tar ball of the moodle data directory? Please refer to link below.
Things to check on server where you host now:
config.php file in moodle code ... config lines like URL to the site.
Make sure that line is the same as your FQDN for the server as hosted.
It would help to know if the hosting chosen with provider is Linux ... if so what 'flavor' ... Ubuntu, CentOS, other?
That's probably enough to get started, but by no means a complete 'how-2' migrate a moodle.
Official docs on how to migrate: https://docs.moodle.org/34/en/Moodle_migration
'spirit of sharing', Ken