Optimize Amazon Listings, Amazon Listing Expert, Ebay Listings

We have been selling our own products on Amazon for many years and we thought we had someone who was an expert to help optimize our listings, our store, and create campaigns to create awareness for our unique items but unfortunately he is no longer responding and won't fix the issues he caused first. So we need someone who will work with us carefully to understand what we need to do, to check out the items that we need to create or redo and make everything look amazing to our listings are showing up when people search.