I reckon its probably because of the closing on 31st march, 2013,
sellers are not accepting any payments. Hopefully they will start
accepting payments from Monday onwards and will refund the money if paid
more than once for the same item.
Same thing happened to me, made a payment of 18k for a mobile phone
using a credit card, payment page said payment was unsuccessful but
received a text from HDFC bank that payment has been processed,
contacted bank and they confirmed that money has b...