Modify Prestashop Testimonial Module

Hello, I have a testimonial module that I would like to modify, its running on Prestashop 1.5.6 1. I want someone to add the option so the module sends out a feedback email to every customer several days after the purchase. Where the customer find a link to submit their feedback. 2. Design the front office feedback box to our template 3. Design the feedback email that goes out to the customer, so it looks good. The module I have is this one. [login to view URL] Dont have a big budget so Im aiming for around 30 usd.