Vistara — Ticket cancellation

I have called vistara customer care number [protected] on 1st December 2021 to request to cancel my vistara booking reference # OC8RNJ. The customer care representative has confirmed to me that she has cancelled my booking and there will be a deduction of Rs 3500

I did not get any official communication that my booking is cancelled. I called customer care above number on 9th December to know that my one sector that is Amrtistar-Delhi booking is cancelled and my Delhi-Amritsar booking was not cancelled whereas I have asked to cancel my complete booking. Also the customer care respresenative Ms Shaina did not give me information how much refund I will recieve.

This is a very poor service for a leading airlines.