Changing The Overall Width With a Contact7 form

Hi everyone,

Have been trying to do this with no luck whatsoever, a very kind chap forwarded me to the contactform 7 FAQ page but I couldnt see anything on there.

On my website which I am currently building here’s the link to the page in question: https://media23.co.uk/contact-us-affordable-website-design-services

as you can see to the right of the contact form there is a mass of white, this is because wordpress thinks or at least contactform7 IS taking up all width of the page. I want to place an image in that white space but I cant because of this. I have tried looking at the code on the page but I cant seem to find anything that tells me about the issue I have.

Really scratching my head here

Thankyou in advance,
Richard