Amazon FBM Specialist for Brand only.

I am looking to hire an Amazon FBM specialist to optimize my existing listings and increase sales. I have listings already created, and I would like help to get them performing better. This includes improving on already existing content, images, metadata, and other copy related elements. In addition, I would like to be advised on the most effective Amazon Advertising Management strategies that are suited to my brand and budget. My goal is to build a strong foundation for sales growth from these optimized listings.
please offer your services and price you will charge to manage account, and how you will start, also mention previous work samples including your past work sales and success stories for brands.

looking forward to hearing from you.
Thank you.