Dear Khun Ajit,
Thai laws allow the merger between Thai company and Thai company , not allow Thai company merger with Indian company by close Thai company.
You can terminated Thai company by liquidate ACPL Export (Thailand) .
ACPL Export (Thailand ) have deficit in balance sheet, not subject to tax when they return capital to share holders.
ACPL Export Pvt. (India) as share holder can book loss from ACPL Export (Thailand) in account loss from investment.
Regards,
Sirawit