disabled charge

I flew from penang to kl I booked ticket online which was rm40 only and I ticked wheelchair because I am using my own wheelchair automatically a charge if rm60 was added to the 40 making my total rm100. The website is ambiguous it does not state clearly that if u using your own wheelchair there is no charge and that you must only tick wheelchair if u need to hire or use the airasia wheelchair to board I asked for refund at airport they refused because I paid online they said I must complain on their website which I did there reply was that in there rules and conditions no refunds will be done it unacceptable and against the fair policy of the customer protection act. Their website does not clearly advise disabled about no charge if u have your own chair and the rm60 charge if u use the airasia wheelchair to board if u don't have your own this is ************** and misinformation from the website which should be clear so that this won't happen again to other disabled ? in future I want my rm60 refund I could have bought another ticket for rn40 unacceptable resolution from customercaresagathavan shunmugam pillay (Booking No: OIZF9H) 19 Feb 2015 Penang ? Kuala Lumpur - Travel