I trade online with nirmal bang securities pvt. Ltd on 11.10.2012 he sold some of my shares in my demat account without my consent. I had debit balance but that is not new because it has been so for the last two years and he had been charging interest in the name of delayed payment surcharge and was holding double the amount of shares in value wise with him in pool account . But he chose to sell my long term holding where i would suffer the maximum loss. Please advice