PHP upgrade

I want to add a new plugin “Unbounce” on this site but this plugin’s confirmed that our PHP version now 7.1 does not support for this plugin so we are going to upgrade. I have contacted our hosting, HostGator, and made PHP upgrade to 7.4. However, my WP still displays PHP version 7.1 How to fix it on WP? Thanks!

• This topic was modified 3 years, 6 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic

The page I need help with: [log in to see the link]