ProStocks has dedicated call and trade desk. You can call on +91-22-38 110 103/104 to enquire/cancel/modify or even place fresh order. You can also call on +91-22-38 110 110 for all kind of support.
There are no additional charges for cancellation as well as modification of order through call and trade desk. Rs 25 per executed order apply for all order placed through call and trade desk instead of Rs 15 when order is placed by client through internet.