Create a Joomla addons

Currently i have a website that is already contain point system. What my point system did is, when user purchase product from my site they able to contain points. And the points they have can convert into discount. What i need now is a addons: When user refer the website to his friend via facebook, email and other social media site by using or link provide thru our website. And the user's friend clicked on the link and purchase product. Once user's friend purchase any product, the user able to gain points same goes to his friend. This is a very urgent project and require programmer to get it done within 2 to 3 days. Only confident programmer apply and once you bid for the project.