Via.com / Flightraja Travels — non refund

I booked flight ticket in air india for 2 passengers through via.com and my booking details booking id : fmnaa3b4vfqrh. I booked a ticket on 29th feb for 18th july date of travel. Due to the non operational of flights i had cancelled it through via.com on 10th july as i had not got any msg till that date. Till now i did not get refund and not even a reply to my email also. I had sent number of emails but not a single reply i haven't got. I had called many times in customer care but till now i couldn't speak their executives sometimes i spent more than half hours for waiting. Plz help me to get the refund. Customer care executive are not at all attending the phone..