Style issue internal or external

Dear Sir
kreativestudio.ca is my site there i hava a contact form on index page for which i have “contact form 7” plugin .
i installed ur FS plugin and add it to a popup plugin that when page loads ur contact form does get load but still it is taking the theme style even if i have selected the internal style ]default, edit below] from the combo box why arent ur form style applied to ur contact form.

https://www.ads-software.com/plugins/si-contact-form/