Wordpress GoodDay Theme errors fixing

General information for the website: The site is located at www.office28.co.uk. It's a Wordpress site with GoodDay theme installed
Kind of development: Customization of existing website
Description of every page/module: So I installed Wordpress, then paid for GoodDay theme from Themforest.net. Both installed successfully however whenever I try and get the demo content uploaded it throws up error messages on the site, even though it appears to have imported successfully.

I'm assuming that this is a quick and easy job for someone to do.

All I need is for the 'GoodDay' demo content to appear and work on my site so that I can go in, change content and images etc and do the SEO.

I have the original zip file and although I have already updated the files as described in the read me .txt file. I can send all original if you prefer.
Description of requirements/features: Features are already in the site. Just need someone to install it properly.
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