Exchange policy that sucks!

My mother bought my son a i-play Flying Ball on 31 November 2018 for a Christmas present. They were not here during the holiday and he only received his present on 17 March 2018. They live in Lichtenburg and we in Marble Hall. We saw each other on September 2017 and this weekend for the first time after she bought the present that is why he only received it now. When we opened the present my son wanted to play with it but the switch that puts it on and off was pushed in and could not work. He did not even had a change to play with it because it was broken already in the package. We went to Verimark Lichtenburg to go ask them for a new one. The sales lady said it is pass 7 days and she could not give us a new one. She could see that the product was not used or abused. But even if he got the present on the day of Christmas the 7 day policy would not even work, because of the purchase date. Now we have a upset unhappy boy with no present to play with from his grandparents. If it was abused I would say yes, sorry we could not give it back but it was broken already in the box.