Consumer Redressal

i have booked a ticket with air asia airlines,i had triple vessel block in my heart and my docter advised me not to travel.on my health ground i request airasia airlines to cancell my ticket .They have cancelled my ticket on my request and sent me advise to avail the cancelled ticket amount by using the user name and password given to me.since iam advised not to travel by my docter i have booked a ticket in my friend who is going travel by air to get credit amount of my cancelled ticket amount.but though i had booked the ticket through my username passward the airasia airlines has not deducted the credit amount and asked to pay the full ticket amount.then i have paid the full amount.now i should get my cancelled ticket amount,i cant travel because of my health condition,airasia airlines asked me to avail the credit amount before 04/01/2014.now i whant solution to get back my cancelled ticket amount.i whant your help in this regard