Issue with Site description on Google/ Search engines / robot.txt

Hi,
Suddenly the site has lost its description and looks like this when the domain brand name is searched - http://monosnap.com/image/0cEODWr0cjHSS90C8iqq08E7Qso2xQ
- http://monosnap.com/image/raEHPjhKxvNcJlAjPIDoEaEnFD1CdL
Its mentioning robot.txt file is not there? how do i re-add/ ad it and also show the menu tree of key links like - http://monosnap.com/image/5CFYswCKsLlI5r6AX8hB4UpxoK3ZA4
Domain: http://tinyurl.com/o32u9zr
Support access is ACTIVE until August 14, 2015 12:36 am

Thanks
Tom