Air Asia — refund not received

I made a booking, ref no rh1mul. Air asia claims they have refunded the amount but i have not received anything, they asked me for my bank statements which clearly show no refund has been received. Since last week they are saying they will provide with a rrn number, but nothing received. Everyday they just make a new excuse. Horrible customer service. No one from their team ever calls back or emails, very very bad service. I just want my money back soon.

Regards,
Tina george