I understand that you are seeing a Shopify logo in the bottom left of your website that you would like to remove. I believe what you are seeing is a pop-up bar that only shows to the account owner when they are viewing their homepage on the public site. If that is what you are seeing, it would look like this:
This will only be visible to yourself or other staff members on your store. You can confirm this by viewing your website through a private/incognito browser window or in a new browser or device. If you are seeing something different please feel free to reply back here with a screenshot of the icon and we can continue looking into that with you. If that is what you're are seeing then please go ahead and mark this thread as solved!