How to remove "Online shop now open" link and "Shop now" in header

I’ve recently started working for a business that runs their own WordPress site. At one point, they paid to have an online store hosted (although I don’t have very many specifics about the online store because no one is quite sure how it really functioned. I think they purchased the hosting from GoDaddy). A little while after they set up the website they cancelled the online store and now the “shop now” button in the header and the green picture/link that shows up on almost every page directs you to a dead link.

I’ve been through what feels like every admin page on WordPress but I can’t find any reference to the link/header button, let alone any way to remove it. I’ve seen various posts on the support forums for ways to remove the home button or navigation bar, but I haven’t found any reference to someone having a problem similar to mine. I haven’t got any experience with CSS so if the solution to my issue is something that requires a little bit of coding please explain where/how to make the changes.

If it would help for y’all to be able to see the website, the url is cowan-farms.com

Any help y’all can give me is greatly appreciated!