Create a very simple thank you page

Some guy did a half done job and I need someone who is reliable enough to help me fix it. I need someone who knows wordpress and the contact form 7 plugin expert to help me link the existing button to the thank you page that you will create (The thank you page has already been created, but you will need to add a picture and some GA code to it, I will provide the GA code). There is already a thank you page, but you need to do the linking. This is crazy easy if you know what you are doing. I just don't know much about contact form 7 plugin. Please don't bid big because its dead simple. I have many more projects if you are good, I need reliable people. Btw, this is urgent I need someone to work on it right now. I think it only takes you an hour or something.