RedBus India - E-ticket not issued but amount debited on booking bus ticket

I booked a bus ticket through redBus to travel from Chennai to Tirunelveli in "Mango bus" travels on Jan **, **** by **:**PM. I got a below confirmation from redBus through SMS.
"
Your Chennai to Tirunelveli ticket (TK*F********) is confirmed for Jan **. PNR: *TQ*KNU. Boarding point details are on your e-ticket.Please note: You need to carry a print out of the ticket that has been mailed to you. -
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"

But I did not receive any e-ticket. So I called, redBus support and asked for e-ticket on ** Jan, **** at **:**PM. They said, "the transaction details are not present in the system. So the money will be refunded". I tried to cancel the ticket too. But error thrown like "no such ticket present". I called redbus support again by **Jan, **** and I got a complaint ID for the same. But now, redbus is saying the confirmation was sent and so the amount cannot be refunded.
Mobile number from which call has been made: **********
Customer care number to which call has been made: ***********
Date & Time of call: **th Jan, **:**PM
Complaint ID: ******

Email ID: rani.cse**@gmail.com
Mobile# **********
Ticket# TK*F********
PNR# *TQ*KNU

I have all the proofs in my gmail account for the same. Kindly help me in getting the refund of Rs.****/-