Footer

do you have access to footer.php template for your theme or child theme?

First of all, the copyright text is in a footer widget. Look in your widgets.

Secondly, you’re using a premium/paid theme. It’s best to go to the support site where you bought the theme – http://woothemes.com/ – for help with customizations and issues. You paid for support when you bought the theme, so you should contact the people who sold you the theme. These forums are for free themes available in the WordPress theme directory at ww.wp.xz.cn/themes/. See http://codex.ww.wp.xz.cn/Forum_Welcome#Commercial_Products