Firstcry.com — Double the charged from me

Website:

www.firstcry.com

I have purchased Mamypoko diapers pack which is 1499/- MRP.

I got discount of 655.81 rupees on the MRP price. So the product price should be 843.19 rupees. But the FirstCry.com charged extra GST (101 rupees )on 843.19 rupees and the final price i have paid 944.37 rupees.

Please resolve this. This is happening with all the products published on the FirstCry.com platform.

Order No.: 8796782FRS765E7F1
MRP of the product: 1499 rupees
Discount: 655.81 rupees
Amount paid to FirstCry.com: 944.37 rupees