You are able to see the list of enchants before buying, that's why there's a list linked on this description page so you would know what you're buying, but wait! There's more - you can delete any enchant you want, edit it, change every mechanic about it.
If you're telling me that enchants like Springs or Anti-gravity are the same, you're mistaking. One adds speed, other jump. It's the classic duo of enchantments on minecraft. Please note, that I haven't made up these enchants and they're enchants from
https://cosmicpvp.com/ - biggest faction server, which is most liked for it's enchants.
I do in fact know that ALL OF THEY WORK, I have just tested them myself. If you do not believe me, I can make a test server for you so you would be able to see with your own eyes that they do work and it's a compatibility issue on your end, possibly worldguard as you'd imagine no one wants your protected land to blow up or be destroyed, which will limit certain enchants you've listed.
For support, I told you that I get no notifications for that thread. Ask any developer with more than 10 replies in 'dicussions' thread, any developer will tell you the same, it's a spigot issue, i just simply don't get notifications for your replies.
Bot checks verification every 2 minutes and for 2 times after you verify on discord, so maximum time possible to wait is a total of 4 minutes, not 10.
I don't see how this is my issue that you are unable to use proper channels to request support, there's 400+ members in my discord, more than half are verified and do ask for help when they're in need to, should have just posted something in discussions if you aren't able to use github, we would have worked something out that way.
Either way, if you want a refund or figure out what's causing malfunctions like you've listed, accept my friend request on Discord or just simply post a message in discussions channel, will help you either way.