Need help today to make this responsive

I have a website I’ve been working on with another developer. The client wanted a new landing page that looked like starlanevineyard.com
So I hired a developer to do that and she used the ‘I am one’ template. Once it was done I realized it wasn’t responsive and the client is having a meltdown. The developer I hired said this is beyond the scope of our agreement. Can anyone help me today to make this responsive?
The site is emeraldcreekwinery.com
Please let me know what you would charge. Thanks, Andrea