Footer widget on mobile

Hi there, and first of all – thanks for a cool theme.

It has been fairly easy to use, but some time after going live with a site, I discovered that the footer widgets are on top of each other in mobile browsers (i mean really on top of each other, on the same line).

That doesn′t look good at all. Is there an easy way to fix the responsiveness so that one of the wigets moves under the other one?

Here′s a picture to show you my problem:
image link

edit: typo