Integrate merchant account into website/blog

I need a new Merchant account added to my current website in place of the old one. The Merchant must be integrated to Work with current Features without altering them. The current features must continue to work the same way after installing the new merchant. I need current Month e-book uploaded and to function the same way the last month e-book did without being altered in anyway. A secured seal is already on website and must be replaced when adding new merchant. Web developer must be experience in integrating merchant account into a website/blog and building websites. You must be the actual person that's doing the work. Web developer must complete project within 7 day's. Once the Merchant and e-book is integrated and working correctly with all the features and each page is tested by me and is satisfactory, I will release the funds. Here are a list of the features that's on the website already and must remain functioning the same and not be altered in any way. 1. When a customer sign up for a membership they must agree to terms and conditions before they can pay. 2. They must create a user name and password to access the members area. A message is delivered to their email automatically then they must click on link to activate their account. 3. When a customer signs up for the platinum plus package they will receive an email to activate their account. They will also receive an automatic email every time I post a new prediction and receive new updates. For the platinum plus package only. They will receive the automatic email with all new post. (not for the regular platinum package) 4. The e-book is downloadable by each paid member. This is apart of the platinum package and is accessed in the members area only. 5. The video on the home page is active and can be viewed on a desktop and mobile phone. 6. The video and all content on the website is mobile phone compatible.