Since i have also started working out in gym since few months and have lost few kgs so here is my opinion. You have not mentioned properly about workout.In order to burn fat you need to have more muscle, the amount of muscle you have is directly proportional to calories you burn. Add weight training to your routine and food which has good amount of lean protein(egg whites, paneer, chicken breast, fish etc) which help in muscle building.
You should always focus on building muscle to loose weight. Have a mix of weight training and cardio.Crunches will help you grow abdominal muscle but will not reduce your belly fat if you have beleived so.You should include more of compound exercises like deadlift,squats etc... to burn more fat.Avoid completely junk food and reduce the sugar intake.You can ask for more questions if you have any particular doubts