In a large skillet over medium heat, saute the ground beef for 5 minutes. Add the onion and garlic, and saute for 5 more minutes. Drain any excess fat, if desired. Mix in the olives, green chile peppers, tomatoes with green chile peppers, taco sauce and refried beans. Stir mixture thoroughly, reduce heat to low, and let simmer for 15 to 20 minutes.