NEW BICYCLE GAVE PROBLEMS FROM DAY ONE

On the 27 of August 2015 I bought my son a brand new Raleigh bicycle at Game in Paarl, which was assembled by one of their employees who works in that department. I must mention that he was struggling when trying to attach the brakes to the bicycle, but succeeded. As soon my son and I came home my son got on the bike, driving around in the yard. Me and my mother immediately noticed that the bike was making a funny squeeking and knocking sound. I decided to take the bike back to the store the next day, but the store was closed, due to stock take, I went back the next day and the store people took a look at the bike and confirm that the front wheel was buckled. They told me I must come back the next day, because they must do an assessment on the bike, but the person who does that was not at work that day. Two days passed and I heard nothing from them. Three days later I decided to call them and they informed me that I can come fetch the bike, and that they did fix it. I took the bike home and as soon as my son got on it to go for a drive, it was making exactly the same sound that it did on the first day. I want to take the bike back for a new one or they must refund me.