Bug fixing/Improvement on Django based E-Commerce Website

Hi! I have a django e-commerce website and want following improvements/bug fixes: 1) "Default Sorting of products should be based on the most purchased products in the last month. In order to increase the response time of the pages, the sorting should needs to be cronned, which is running every day" 2) Search option to search within the description of the product also. 3) Product group system, where we can create product groups (this is different from categories as product group will have many to many relation) 4) "Cookie based referral code system System should save the referral code in cookies and autofill it when user comes to the referral code page (auto fill if there is no other reffral code in the url)". Cancel referral code entered option. Link for auto selection of LEFT or RIGHT side. New user should be able to join using Refer's mobile number and email id also 5) For product page, the Description heading and box should hide if there is no data for the product. 6) Order model is not having username, rather is has email id field. Shop Order table should save User_ID (as foreign key as well). Shop Order shall save previously saved order's user_id as well 7) Option to change E-Mail Id and Mobile Number 8) Option for user to add comments while placing an order. The comments added by the user should be visible in order details in admin also 9) Option to block users from login. Report to see & search for blocked users. 10) Google Translate option 11) "Custom django error pages for 404, 500, etc error. After showing the error page, it should redirect to landing page after 5 seconds"