MAKRO ONLINE IS TERRIBLE!!!!!!!

My son couldn't get his Birthday Gift because of MAKRO!!!!!!!!!! I ordered bicycle online for my son's 10th birthday. The purchase was successful, and the payment was deducted, however the next day I received an email to say that the order was cancelled, and refund captured. Why was the bike still showing as available?? Why wasn't it updated? So now I have to explain to my son that I am waiting for a refund which is taking forever. Is it fair for me to be in this position? I must say this is poor service. I would like my refund URGENTLY so that I can get my son his birthday gift!!!!!!!