I need a professional power point presentation design

Information for the business: We offer 'installments cards' for consumers through different banks
Industry: Business
Kind of design: Full presentation
Target audience: Mainly Banks and Investors
Number of slides needed: 20 - 25 (most slides look alike)
Ideas for the visual style: Illustrative photos and icons
Preferred colors: Will provide the color scheme (pantone will be provided)
Extra notes: I need an elegant presentation that will capture the audience attention.
It should be professional, addressing senior executives (Banks' CEO, Investors)
I will send the full presentation, logo(s) and pantone colors for all logos that are used in some slides.
I need to have a long brief with the designer explaining my company's business and what we do as well as the presentation content page by page to understand the message intended.
This is not a 'template' development... this is transforming an existing presentation into a professional 'look and feel' illustration of a mega project.