Changed WordPress Address (URL), then back to original, now website isn't workin

I changed the WordPress Address URL from https://www.casbahdesign.com to https://www.casbahdesign.com/shop, then changed it back to the original.

Now when I visit my website both through back end wordpress and via a random user on another computer not logged in, the website has completely messed up, layout messed.

In the URL it is still putting /shop after the https://www.casbahdesign.com even when going to /wp-admin….. etc. etc.

Can anyone help, I’m building this site for a client and need urgent help.

Sorry if this has been bought up in other threads but I just can’t get my head around it.

Thank you so much anybody who can help me.

Aaron.