Hello Baskan, If the account was given to another player, this is a direct breach of the terms of service you agree to play by. I'm sorry to say It doesn't really matter if your intentions are malicious or not.
D. Account Sales. The Account supplied to you is personal to you, and iGP Games does not recognise and expressly forbids the transfer of user Accounts. You shall not purchase, sell, gift or trade any Account, or make any such offer, and any attempt shall be null and void. Any distribution by you of your Account and/or your Login Credentials (except as expressly provided herein or otherwise explicitly approved of by iGP Games) may result in suspension or termination of your Account.
You can view the full terms and conditions here:
https://igpmanager.com/terms.htm
I know this isn't the answer you want to hear, but hopefully it helps you in understanding what has happened.
