Need help changing mobile layout

Hi Everyone!

So I nearly have my new site complete with only a few more tweaks needed.
One thing thats super important to me is the way it appears on smartphone devices.

I don’t like the way it looks right now at all…
I am interested in having a very big and clear click to call button and a couple of images as well at the very top.

I’d also like to disable the main banner on mobile and move the menu bottom to the top right/left corner.

Below all that I want to the rest of the page can appear as usual.
my site is http://www.southphiladelphialocksmith.net

Any help would be very much appreciated!