I just wanted a retro machine to play some games and now it's backfiring on me and I'm out of a lot of money
We see problems like this come up a lot with pre-made RetroPie setups found on places like EBay and Amazon. Unfortunately, the machines shipped out are usually just hanging by a thread of functionality due to the seller's lack of care/knowledge. As a result, we are unable to support these particular setups. RetroPie is actually free and runs on very inexpensive hardware. It's really important that you set the system up yourself so that you'll be more intimately acquainted with the components and better understand what may have gone wrong as problems arise. The good news is that, despite being initially scammed by an unscrupulous seller, you now own all the components necessary to begin fresh with a clean install of your own making. Should choose to do so, all the information you'll need is laid out here.
from your screenshot mate, it looks like you're putting all your roms in a compressed zip file. While retropie recognises zip files, they have to be zipped individually with the name of the rom. This is why in your list it just says "add games here" as that is the name of your zip. Take them out of that zip file and then zip them individually and then reboot.