In case your were rejected, don't worry. It should not be interpreted as a definitive failure. The best thing in this case is to simply ask more details about why it was not accepted. Then, you can probably approach a help office to help you put together a so called Widerspruch, an objection, in order to reverse the decision. The same applies if your case was accepted but the benefits you received are below what you were expecting. Try googling "hartz 4 widerspruch hilfe name of your city" or even "hartz 4 widerspruch hilfe name of your city Englisch" to find help in your area. You can also check this website out.