High Dutchhobby,
I recommend using Neem oil. I always use this one because it already has an emulsifier in it, so it mixes well with water. It's 100% organic and only costs €10 including shipping for 100ml, which can take out quite a few insects.
Here's the link:
https://www.berivita.com/neemolie_met_emulgator_mix_water#:~:text=U%20hoeft%20alleen%20maar%20water,met%203%25%20Neemolie%20in%20water.
Make a 3% solution with water and spray the leaves (top and bottom) with this stuff. About every other day for a week and the insects will be gone.
You can also use this stuff perfectly if you have bugs in the soil that are damaging your roots. Just give a 3% solution like you normally water. Same result in about a week!
Good luck man! 😋