Fix website PHP and Contact form problem

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Fix website PHP and Contact form problem
[login to view URL]
I am having issues with the [login to view URL] and [login to view URL] files. I am hosting on Godaddy. Something keeps changing those to files to empty files / replacing them and they don’t work. It has to be something on the server changing them.
Also, the contact form does not appear to be working.
I need someone to identity why those PHP files are being changed and tell me how to stop that from happening.
And I need the contact form fixed. My client is not getting the emails when someone fills out the form and submits it.
Skills:
HTML5
, PHP

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