Frustrated and sad

I went to return shoes that I bought for my son for the martic farewell it was to big they did not have a size that fitted him so I then asked for a refund they refused They said it is against Company policy. I said it against the comsumer act and they must allow me to record them. They refused. How should go about getting my refund. People like this doors must be closed because they are wolves preying on the innocent public. I had to buy another pair of shoes left with shoes that no one can wear.?