Amazon marketing specialist

Hi there, we're looking for an experienced Amazon marketing specialist to help us quickly to improve and boost our sales. We have listed on Amazon a short list with 5different items (PPE stuff: disposable face masks and thermometers, high quality) and our sales not performing very well. So if you have a substantial experience working on Amazon, if you know tips and trick how to increase and improve our sales, please give me more details as we need some one soon to take care about our account.