Air Asia — Not provided wheel chair

I have requested for wheel chair for my mother but no one provide her wheelchair, she asked for wheelchair in Delhi, Kuala lumpur, Sydney and Auckland airport. my mother fell down at Sydney airport because you didn't provide the wheelchair . you are fully responsible for this accident. She is 68 years old and got hurt. Why are you put option website. It is no use there just take if off. It is one off worst airline in world.
booking no. ITPLSB.
flight no. D7 183 from Delhi to Kuala Lumpur
Flight no.D7 288 from Kuala Lumpur to Sydney and Sydney to Auckland.
i do request for full refund.