Highend theme queries

Hello

I have a few queries with my Highend theme.

1. I have changed my site accent colour and my header background using the customise feature, but none of these changes have taken effect on my site.

2. How can I change the icon feature box text to white.

3. I have noticed that on my tablet, the social icons are missing from the right widget in the top header.

4 Is it possible to increase the font size of the button text

My site is: http://www.locallinko.com/landing-page/

Many thanks