Uber India — charged double amount without notification

Address:

New Delhi, Delhi, 201012

On 16/04/2019 i have booked the uber cab and it show that i have to pay rs 331 for the rise.
When i finished the tour i was surprised as the cab driver asked the doubled amount that was showing in his app. Neither the cab driver nor me has any clue or info for the double amount.
When i tried to call/email uber customer care number it was not working/operational.
Then i went to the help section then after four day the replied that somewhere around 3 years before my outstanding was some rupees and that has been added to the amount.
My question is that
1. If i had some due with the uber then why it was not communicated with me for the last three years.
2. If i had some due with the uber what it has been not showing in the app.
3. If i had some due then why this is not showing the bill which i have paid double amount.
4. I have paid the double and they are showing the half amount over the app which they also agree
I felt harassed and cheated and now uber has stop replying even in the help section.