Buy a chemical drain cleaner from the store. Chemical drain cleaners unclog drains with chemicals such as potassium hydroxide or sulfuric acid. When properly used, they will clear most drain clogs. Choose a type of drain cleaner from your local hardware or discount department store. If you need any cleaning service for this process contact to Bond Cleaning in Canberra . For more details visit : https://www.bondcleaningincanberra.com.au/plunger-drain-cleaner-didnt-work/