From what I have noticed, the number of arguments you can get for each turret is different. For instance, railgun has a lot of augments while gauss doesn't. Hulls all have the same number though. You should be able to find more on this in the wiki

You may need to update your client. Tanki is also having technical issues and they are currently working on them. Hopefully you can play soon!

Everyone else quit I guess.

@TurkishSniperPower  This could be for a few reasons. I will list them.
1. Be sure you are checking the correct hull. It is for wasp if I am not mistaken. This recent update made it very confusing to determine which hull you get augments for.
2. Tanki is just being slow today. You will get it. Be patient!
3. You maybe mistaking it for cold immunity in the garage. Cold resistance should be near the right side of the screen in between jammer immunity and heavyweight construction when you open the menu to display your augments.
If none of the above works, then I would consider reaching out to customer service and explaining the issue in as much detail as you can.
I hope this helps!

I bet there will be one for the next big esports event. Perhaps another month or two?

You could try contacting customer support and explaining what had happened and they will look into it.