Dubba trading: Since it is not a legal transaction, there is absolutely no transaction cost. Traders opt for Dabba trading over the formal trading system as the transactions and any gains from it are not subject to taxes such as income tax, securities transaction or commodity transaction.
Dabba Trading is a process used by brokers to illegally route their client's trades (buy/sell orders) outside the stock exchange. Dabba Trading software can delete zeroes at whim.
On the basis of the evidences in your possession to prove the fraud has taken place, you can approach the local police with a complaint, get a FIR registered for the fraud played on you and then follow it up, however it may not be possible to recover the lost money by lodging the police complaint