The contact form 7 skins expect the HTML you enter via the Contact Form 7 admin screen to follow a particular pattern. If you extract the 2.x zip you downloaded on your computer and then open the readme.txt file you will see some example HTML code. If you copy and paste that HTML code into the Contact Form 7 form configuration page you should find that the skin works.
Of course it’s always possible that your theme has some styles that need overriding in Microthemer. I can help you with this if necessary. Please feel free to send me login details for your site via this secure contact form: https://themeover.com/support/contact/