Myntra.com — wrong information regarding payment

I had been a regular customer of myntra since 5 years almost. Recently i had ordered a t-shirt on cod. The price was as shown 849- “total”
The package betrays 998/-.
As i received the package, i called the customer care, the first woman dropped the call on my face, subtly a bizzare behaviour, if am not wrong. Then again i requested a call back, that lady told me about the shipping charges, she was polite though.
But why isn’t it showing on the app.
Why did i have to pay more than what i was asked for if the app is showing just 849/-.