Need to customise existing SAAS platform website

We have one website in our QUT “https://sauravr11.sg-host.com/”. It is actually a SAAS platform where store owners can host their business. We need someone to redesign and customize this website. and make something similar like this – https://singlebag.com/ or Dukaan. Also, need to change minor functionality and UI/UX work is also there. Please register on mentioned platform and see internal dashboard as well to get an idea.