kcadminuk
To change the copyright logo
open template.css file find this code
.t3-logo-dark-sm a {
background-image: url(http://static.joomlart.com/t3/logo/t3_logo_dark_sm.png);
}
change the image path with your image.
About the Joomshoping copyright add this code at the end of template.css
#mxcpr {
display: none;
}