Centre align menu header on mobile sites

Hi

I'm trying to get my header (where it says 'individually tailored.....) to be centralised on mobile/tablet screens under the logo but its going off the edge of the screen.

I had a support chat with Kris who told me the css is messed up and I need to create a ticket here.

Basically, I want it like the attachment on normal pc/laptop screens (so need to align the 'call us on' as well) but on mobiles, I want the call us on to go above the logo (as it does) and individually tailored... to go centre and below the logo?

Support access is already granted.

Thanks
Farzan