In my experience there are 3.

1) Eat
2) Train
3) Sleep

Dont want those? There are always magic fat burners out there which burn a hole in your wallet.

How much calorie are you eating a day and what is your TDEE?

What do you eat all the time? Do you keep a Food Diary?

When you talk about exercise, what are the activities you are into? Jogging? How many Minutes per KM? What are the time you spent doing the exercise?

To speed things up, simply eat lesser CALORIES (Not Carbs) and you will see the result.

How is your progress so far?

If you are not tracking anything, if you have not test out your real TDEE, if you have just started last Friday for like 5 days, what do you expect to happen? Loose 4kg a day? C'mon dude. Losing fats is easy, but not that easy. 5 days? PFFFTTTTT.

You are desperate? Go either lipo suction, or cut your 2 legs. And 1 arm maybe. Confirm loose weight.

By tracking I mean track how much you eat, then track what you eat, then track how your weight is fluctuating.

1) Set up your TDEE. Say 2300kcal.
2) Learn how to read nutritional label
3) Google the calories in the type of food you eat. Every single thing you put into your mouth except plain water
4) Add up everything that you ate in a day
5) Record/ write down in a journal of what you ate a day, keep that calorie intake at 2300kcal everyday, for 1 month
6) First thing everyday after you wake up, pee shit empty stomach, then weight in yourself and record down everyday, for 1 month
7) Average out the weight for 1 week. Day 1 to day 7 divide 7. Thats your average weight for a week

So if your weight goes up, reduce your calorie intake from 2300.

+1

I've been doing 4x HIIT & other 3 days light workout.
(I feel my skin tighten & look refreshed too)

surprisingly, I lose 4kg in a week.

it was a mere experience.

I ate 1 apple, 1 sweet potato, protein shake for a week.