Flipkart — automatic cancellation of orders

Address:

Bangalore, Karnataka

I tried to purchase Asus zenfone + 2 tb hard disk costing around Rs 13000, by availing 10% cash back . This order was automatically cancelled and the amount was debited back to my account then tried to order the phone alone and the same thing is happening why the orders are getting cancelled automatically, i have called up customer service and mailed to [protected]@flipkart.com... but no response from them too