Dark circles and "bags" have several causes and treatment options (and limitations). I have a lot of respect for my friend and mentor, Dr. Peter Adamson, in Toronto. His office is at Bloor and Avenue Road. Search for "Adamson Associates Cosmetic Facial Surgery Clinic."
For patients with pigmentation under the eyes, a bleaching cream such as 4% hydroquinone is sometimes helpful. For the "bags," surgery in the form of a transconjunctival lower blepharoplasty may be indicated, or perhaps the hollowed orbital rim needs some Juvederm injected (avoid fat grafts here!). A complete evaluation in the office is really required, though, since not all "dark circles" can be fully corrected.
All the best,