Slide deck - 11 slides and a few graphics

I have made a very basic 11 slide pitch deck for a new business venture. It is in basic Powerpoint format
I need:
1) To make it look slick/professional
2) To include a mock-up of what 2 of our webpages and one of our mobile-app notifications might look like.
and/or
3) To create a flowchart demonstrating how the work may flow through our business.
Would love to discuss in more detail with any interested parties.
Kind regards,
Gidon