customize e-commerce multiseller system

Hi everyone
I looking for customize e-commerce multiseller system, I want documents for giving it to developers company to start development professionally

-I have written all requirements (requirements ready)

SLA Preparation
-Writing contract between the developer company and client

-Testing
Test the project when the developing company completes the project.

-The Document must contain:
Scope, Purpose , System Overview, References , Definitions , Flowcharts
Features List , User Stories all Diagrams ,Sequence Diagrams,
JD or required skill set brief
Cyber Security and Security Audit,
Business plan, Data governance plan, Term paper, project cost etc.
(FRE), (NFRs), (SDS) (WBS)

-ATTENTION PLEASE
Please, send me your portfolio, to check the quality, the i will contact with you.