@ABBY I am sorry to hear the frustrating experience you have had over the past month. That's certainly not the experience we strive for.
We have a blog that talks about setting up this exact scenario, running Wordpress in a subfolder. If you haven't already, can you please review the blog to see if it resolves your ask? The blog can be found here.
If it does not, please let us know and we can continue assisting you.