Hey there I've had bug problems constantly so I get the frustration. My first suggestion would be let the soil dry, very dry, but since time is a factor for you, I would suggest to try to remove the topmost layer of soil carefully and get it out and away. Next have a fan pointed directly at the soil surface always. Add the diatomaceous earth as described by others and possibly replace the removed soil. Avoid anymore neem oil as it will leave a smell and possible taste.
Keep up the great work, keep things clean and stay vigilant. When you do harvest get the pots of soil out and away, and aim for low humidity in your drying space and hopefully the bugs will flee. Other than the bugs, the buds do look great.