Make a SAAS platform, where marketing agencies can invite their customers, and gain full overview of their online activities

Hello Freelancers, I'm in need of a dedicated agency, that can help me design and develop a platform, that marketing agencies can use, to track their customers progress. The main idea is, that marketing agencies can invite their customers to their own, customised panel, where they can follow their progress in their online marketing activities and online presence. The project is a bit similar to the danish one found here ([login to view URL]) Use Google Translate for translations please. Please find the attached document, where you will see all the requirements for the website.