Never buy organic soil... I guess you learned your lesson as I did. I still have some Happy Frog left over for houseplants, and I bake it in the oven before using it now.
Mix up your own pesticides, it's cheaper. 1/4tsp essential oil for every gallon of water and a tiny squirt of soap, just enough to get it to foam a little when shaken. Rosemary, peppermint, and cinnamon oil all are very effective. Make sure you're consistent with your soil drenches, do it for every watering for a month.