If the URLs that you added direct vendors to the dashboard, then that’s what is necessary. I link or menu item has to be added so they have a way to access the dashboard.
I guess I’m confused as to what you are expecting, though I can certainly understand the frustration with some themes & plugins.
There’s always d o k a n . After shelling out 300-500$ on their craptastic plugins & “theme”, you are provided with complimentary anal reamings sans lube if you contact their “support”. They’ re not so forthcoming about that surprise bonus when you purchase their wares, for some weird reason.:o
Your site looks great, and if you have an avenue to the vendor dashboard now, what is wrong? Am I missing something? I’d like to help ease your frustration but I’m not clear on What isn’t working?