Jean, thanks for the additional context. However, our support is limited to user accounts with active licenses and are limited to supporting non-standard WordPress themes (e.g. Twenty Fifteen), per our Scope of Support / Terms.
As a bit of help, though, I noticed:
- There are console errors at your site. If needed, you may reference our KB article Using Google Chrome Developer Tools.
- I saw CSS applied from http://176.32.230.46/rockbakehouse.co.uk/class/buttercream-cake-decorating-techniques-5/ @ Line 763 that overrides another rule at Line 611 that overrides the CSS rule coming from our plugin.
I hope things get sorted out for you fixing your custom CSS and other items.