Is there an alternative treatment to get rid of belly fat?

No: Belly fat can be lost in three ways. If a person eats fewer calories than he needs to live on each day, his body will use the stored fuel (fat). If a person exercises more than he did before, but does not start eating more calories, then his body will also use the stored fat. A surgeon can remove fat cells containing the fat, but the person will regain fat in stranger places if he overeats later.

Yes: I do not know your specific situation. Consider a trial of a whole foods plant based vegan diet along with exercise. If you are concerned about getting enough protein, eat nuts, seeds, beans and maybe some grains (if allergies/sensitivities to these do not exist). If your digestive system tolerates these, eat lots of vegetable salads, homemade vegetable soups, raw seeds and nuts.