Customising theme

Hello all,

I am wanting to simply add some text and a button to my premium wordpress theme. The theme is kula: http://themeforest.net/item/kula-responsive-html5-one-page-wordpress-theme/4491523

The support at guuthemes.com mention that this means the theme will have to be modified especially.

If you have a look at my website you can see in the white section i have tried to mock this up how I would like it: http://94.136.40.103/~weownamsterdam.com/

I want it to say Buy tickets, then the button to say ‘click here’. The button will then take you through to a ticketing website.

Can anyone help me out on the best way to go about this?

You help will be massively appreciated!

Thanks