The effects of traditional Korean medicine

I once took medication and acupuncture for a month after giving birth to my first child because I couldn't lose the weight. But I didn't lose even a kilogram in a month, and I felt like I was just wasting money. It was 16 years ago, and I paid 300,000 won for herbal medicine. I was tempted by stories of many people seeing results, but why didn't I lose weight...

Was the period too short? Is it because I didn't do exercise and diet together? I think the medication is to help because I can't do exercise and diet. Since I have some belly fat, I'm curious about how many acupuncture sessions and herbal medicines I need to try.