Report to moderator button will be enough for this case but we need to remember that Indian borad curently don't have any moderators so what will happen even if we report all those posts?
Although there is no mod but global moderators will handle the reports. Once you report a thread it will visible to board moderators and global moderators(AFAIK). So if your report is unhandled it doesn't mean no mod are see that. Perhaps it's not deleteable thats why unhandled.
However @ OP , you can try by reporting single reply. If mod take action then report others reply. I did same thing sometimes. If marked unhandled then I avoid further report on similar case.