If your chickpeas aren't crunchy, it could be due to a few different issues. Always make sure to dry the chickpeas thoroughly before roasting. Then, make sure to roast them for the full time listed in the instructions. If they're still soft when that time is up, you may need to leave them in a bit longer. Additionally, only use a moderate amount of oil. Do not drown the chickpeas, or else they'll get soggy.