Can you please let us know if you have updated the theme? (the latest version is 5.6) If yes, can you please share a link to your website, so we can see your current setup?
We are not sure why that could happen without logging in to your website, but you can use the Jevelin Settings instead as there will be all our theme settings will be available.
It seems that you have already added a logo there, if you also want to add text, then it can be done under Jevelin Settings > Footer > Copyright text.
We can see that your site’s mobile version has a cart icon in the header, did you manage to solve this?