column width not working

when I set the column width within contact form 7 ie 10/2 or 10×2, it has no effect. Ive even tried the css below
.wpcf7-form textarea {width:557px !important;}

url http://www.thiswebsiteisforsale4.com/contact-2

neither solution works? what am I missing ?
thanks

https://wordpress.org/plugins/contact-form-7/