From my own experience I can say that all that methods for fast weight loss aren't more than just a myth. Physical exercises and diets are your best
buddies for this case but yeah, it'll take time, at least several months for getting visible results and longer if you're very overweighted. And in case of diets I really don't recommend to try the strict ones, their help will be short but a general effect on your body will be definetely harmful.

Coolsculpting is a body modification procedure which helps to destroy fat cells with the help of a special device, I tried it here https://mediluxe.ca/en/ several years ago. What can I say... It's really helpful, especially for the 'complicated' areas of body like hips for which physical exercises aren't always effective, and this procedure is cheaper and less harmful for the body comparing with popular liposuction. However general price depends strongly on a certain number of sessions that you'll need for your case, usually it's not the one.

But I should warn you that it's helpful only as an addition to your other methods of weight loss, if you make only coolsculpting and nothing more, you can easily gain weight again and besides in that areas of body which you didn't try to change during the previous procedure. Sadly it's the same like in case of strict diets.