Same thing happened to me. And when I ask support team through mail but I get this rply.
"We would like to inform you that a bonus was mistakenly displayed or assigned to some accounts. Please note that this was not intended, and no bonus should be associated with your account at this time.
We apologize for any confusion this may have caused and appreciate your understanding as we correct this issue. Our team is actively working to ensure all account information is accurate and up to date.
If you have any questions or need further assistance, please don't hesitate to contact our support team.