Jabong — overcharging

Hi,
I had ordered stuff from this website a couple of times before but was never charged more than the billing amount. But recently on my last order i have been overcharged unacceptably.
Order number: 109530661458591181201
Order date: 28 nov 2018
Amount billed: inr 8356.18
Mode of payment: cod
Amount charged : inr 10500.
Really disappointed.
Please investigate