Treatment of RCM on payment to Unregistered Labour contractor

Ravi Srivastava (86 Points)

16 July 2019  
Ram Pvt. Ltd. a Civil Govt contractor, Ram Pvt. Ltd. paid 20 to 30 Lakh each month to Unregistered Labour contractor for supply of Labour.
question:- Should A Pvt. Ltd paid Tax under RCM on payment to Unregistered Labour contractor?
if no, what is treatment of above case under GST?