Etsy Integration by QuickSync

Love the idea of this, but it has caused me more problems than anything. I can't get all my items to sync between Shopify and Etsy (I've reached out for help multiple times), and it keeps changing my stock all on its own which causes me to oversell items then I lose out on fees because I am not refunded for those when I have to refund my customers. Really wish this worked, it would have made my life so much easier!