Professional Powerpoint For Sales Pitch Slides

We have 2 slide packs which we send to potential clients and existing clients. We use this PowerPoint when selling our services which is either Surveys or Claims resolution for Insurance companies.
I am looking a professional PowerPoint sales pitch which enhances our offering, makes us look more professional than our current slides. I want our slides to really impress, be truly professional looking, make us look bigger than we are and not amateurish. I will upload the 2 presentations and it maybe that we only need one which encompasses all and we can cut and use the relevant slides for each service.

Can you give me a demo slide what they would look like?#
These need to be top quality, top class, professional.