How sure are you that they deliberately tried to destroy your SEO rankings, and not them simply underperforming or messing something up? There's a huge difference between the two.
Also, whatever the Indian government's opinion on Bitcoin is, we can't assume that it will be the same for the people of India. I don't think there's any reason for the people to hate on Bitcoin to the point that they would actually try to destroy Bitcoin-related businesses that hired them.
more then likely they messed up the project without knowing it. dont think it is intentional as they need this job during this time of crisis. and a lot are desperate to get job and be paid.
be direct to your hired personnel and ask what the real problem is? maybe they dont know the impact of what they are doing to your platform.