Coupon codes

I’m having a problem with the coupon codes. I’m using [COUPON] but want it to show up with ‘Get Code’ , what shortcode do I need to use?

Secondly when I try to click on the links it’s very difficult unless you can time it right. How do I get it so it doesn’t matter where someone is on the Get Code button for it to allow them to click and be taken through to the url. My website with test data is here: getsupersavings.com

Thanks in advance for any help you can give.