I had 12 word passphrase. Someone from the bitcointalk.org gave me private message and told me that he was a hacker and wanted job. I thought he was lying. I gave him 12 words of my bitcoin passphrase but shuffling. I decided to give him 25 USDT after killing his time and getting my thesis paper editing.
This is careless on your part and I think you don't understand the meaning of the phrase so you are willing to give it to someone else. But then you say thesis problem, does that mean he helped you solve it or how do we try to understand what you mean?
I thought he could not be able to organise them. But now my bitcoin is gone from my wallet. What should I do now?
It was around 0.1243 BTC. Just crying. Is there any law infrocement unit to help me?
If there is someone who can help you get back some stolen bitcoins, then there are many people who may not think the initial Seed phrase is important. There is nothing you can do when Bitcoins are stolen and it is completely your own responsibility. That is why security must be strengthened so that the assets you own can be much safer and it would be stupid if you give that seed phrase to someone else even if your reasons are random.
Just assume your bitcoins have been lost unless you know the person and can meet them to ask for the bitcoins they took back. But if you don't know the person then it is certain that your bitcoins will be lost forever and there is no way to get them back.