It's important to know what kind of wasp nest you're dealing with. Keep in mind that DIY methods like spraying with water and soap or setting the nest on fire (really dangerous!) rarely work. Not to mention, that there is a big risk of stinging no matter what you try. Professional help is usually the safest option and staying well-informed about dos and don'ts will prevent further complications. Description, prevention methods and other important information on wasp nests is collected here
https://fantasticpestscontrol.com.au/blog/fantastic-guide-to-wasp-nests/ Hope it helps!