It's said to hear that we didn't meet your expectations. However, as you mentioned a lot of things about us and our Listable theme, please allow me to shed some light on it. Let's take them one by one.
#1. 3rd party plugins.
On on the presentation's page, we clearly mentioned that Listable demo sites uses both free and premium plugins. Please check this out: https://share.getcloudapp.com/JruWWyAp. Also, if you want to see live a demo installation with Listable that has only free plugins, you can find it here: https://demos.pixelgrade.com/listable-stock/
#2. Support doesn't help with custom code.
That's correct, we don't offer custom work. But we don't even promise to do that. Please find more about that here: https://themeforest.net/item/listable-a-friendly-directory-wordpress-theme/13398377/support
#3. The support team doesn't help and doesn't answer.
I've just checked all the 4 support tickets opened by you and I noticed that we answered to each of them, without any feedback from your side if the solution provided helped or not. Please note that it takes two to tango, so if we don't get any insights about our suggestions, we could think it helped, right?
However, I wrote all this message because all I want is to remember that we're doing our best to deliver the most awesome experience to all our customers. And if you stil want to cooperate, just let us know.