I'm going to be harsh and I will discourage you. Whether you want to hear the truth or not, I will state it. Losing 10kg in three weeks is unhealthy, impractical and unadvisable. If you really want to lose weight and keep that weight off, you need to be open to the truth and the concept of patience. You could get replies telling you how to do it. You'll just be ruining your body and setting yourself up for long term failure because your body will gain all that back and more if you lose it too quickly.
Do you even know if you need to cut your calories? What if you just have to switch half or more of your carbs for veggies and protein while maintaining your current calorie intake? What if you just need to alternate high carb and low carb days to increase your metabolic rate? You've clearly done zero studies on this and you're going for the typical 'exercise till I drop and starve for half the day' route. That is not how anybody should be living and you won't be able to maintain that lifestyle.
It's great that you want to be healthy but don't go for those silly 'two weeks, get shredded' challenges or starve for half a day tips. It will hurt you.