I know little about astrology, but there are scammers in every field, not only online. Depression is a serious medical condition that requires medical care, although not necessarily prescription medications. To recommend that a person suffering from depression visit an astrologer is, in a sense, to practice medicine without a license. At best, it's bad advice.
Emotional balance has little to do with one's stars, as Shakespeare put it. It's chemical and neurochemical., and requires a healthful diet, loving support, slicing through stress, coping exercises such as deep breathing, and possibly either herbal or prescription assistance. (I prefer herbal, as there are much fewer side effects and much lower cost, but I'm not going to practice medicine without a license, either.)