Air Asia — refund against cancellation not credited for more than 3 months

Ref : booking number yulu2m

I had cancelled my return ticket for kolkata-pune departure 11th feb well in advance, i was told refund of rs 1800/- would be made to my card, on 21st feb i called and talked to mr. Syed hussain - ref id 33939999 and was told that by 25th feb amount would be credited but till date i have not received.
It is very difficult to connect your customer care and chat with ava is of no use.
Please refund immediately or i will take up with the concerned authorities