CS-CART Customization Requirement

We are looking for an expert who can finish our Portal customization of CS Cart with in 15 days . 1) Create Drag and drop Style User interface . 2) Make product design more enhanced. 3) Create Market place like Ebay Amazon Shopify enhanced options. 4) Make Amazon Pricing Level Check as priority guidance. 5) Live Chat of Website needs to integrate . 6) Product and Stock Backup and recovery . 7) Different Customer Theme change by User . 8) Different Notification & Alerts 9) Email and all channels messaging single platform and response place. 10) Geolocate IP customer integration . 11) CRM Bitrix24 Integration for Lead Generation . 12) Installation Cs Cart and INtegration as well as adding the Module . 13) We will buy multiple Module for CS Cart we need developer to make sure it is compatible and work properly . 14) Support of 12 Month will be part of the Project and will keep 20% of the total award which will be release only end of the contract term. We required full solution understanding with the freelancer before we award the project . medium of communication will be either decide so we can understand the full solution . we will speak with freelancer team to support on this as we will comply to thier terms and condition and will open this project only on Freelance once agreement will be in place. above requirment may will add so consider 20% more work can be added as part of above . as we are looking for a team or develeoper who has extensive experiance in this. He should support us . Systematic Drawing is attached