Can there be any other ways to lose your body fat other than surgery or diets and exercise?

Not really: Weight loss is achieved by increasing energy expenditure and decreasing energy intake, or a negative caloric balance. The combination of diet, exercise and/or restrictive surgery procedures all achieve this negative caloric balance. If you can't achieve the negative balance, the surgeries are great. Try "my fitness pal" a free app to help you. Good luck.