Shortcode for button shows ..[button link=http….] text instead of the button

Hi guys thank you for reading and helping me out, im trying to customize my website to show a certain button but i think my button shortcode is wrong – which is why im seeing text [button link=http…] where my button should be.

The plugin is woocommerce what is the shortcode for woocommerce buttons or is there a reason why my site wont display these buttons?

Check it out here https://mobilereactor.co.uk/shop/ – i need to fix the shortcode error so that actual buttons are displayed.

I made these modifications to my functions.php file on this page to get to where I am.

Please help thank you…

Theme is XING