Ask HN: How to get the latest version of your site after a migration?

My web host has migrated my site from one server to another one. After the migration, I am now noticing some recent website comments and emails missing from my site. In other words, the site they migrated is not the most up to date version. How do I get them to give me the most up to date version of my site? What are they supposed to do? Is there anything I can do?