No, this is just a scam. First, I asked you about your age, weight gain, etc. Then I asked you if you lost weight or went to the gym or something. Then I said you need their medicine to lose weight easily, and it takes several courses of treatment, and how much is a course of treatment. Finally, you buy their medicine, but it's useless and has side effects. Don't trust these slimming teachers.
If you feel fat, control your diet and daily life.
Exercise more,