I wanted to make a masternode, truth is that I'm quite new at this kind of stuff. It was ESK coin. I accepted the idea that the coins are probably lost, it was just strange that someone can do this without any other additional information from my part. I have never given away any data, just the public address. This is why it was so strange

Hi guys, sorry for writing here, but I do not know where else to post this question.
I believe I was hacked somehow, but I don't know how. This is not about bitcoin, it's about an another coin. Someone has blocked my coins in the blockchain or stole them, I really don't know, the interesting thing is that in the blockchain explorer, the transaction is there, it is confirmed, the receiving address is correct, but the coins never reached the destination wallet. I was threatened with this process of blocking my coins, because I didn't wanted to give access to my computer. The other person knew only my wallet public address. How can someone do this? How is this possible? If this can be done, than it might be a real concern to everyone. This means that not even the public addresses are safe? I don't understand. I thought that someone can steal your coins only if they hack the wallet, have the private key, the wallet backup and the password. I never thought that someone can just block coins in the blockchain or sniff a transaction somehow to end up with the coins you send. Is there any possibility to see how the coins, if they still exist, can be unblocked? Is there something that can be done?
I learned my lesson, please be aware that these things can happen and take care in the future. Thank you in advance. 

Thank you guys, for all your answers and advices.

Hi guys,

Is it possible to claim somehow the bitcoin "Forked Coins" if I had the BTC in my Coinbase account at the time of the forks? (besides BCH, this one was credited later). Is there a desktop wallet which will support the upcoming forks?

Thank you