Product failure

We bought Adidas Lds Baricade shoes on the 25th of April. My daughter worn it twice, and the one strap were you fasten the shoe lace tore out of the stitching. We took it in for repairs on the 22nd of August, wheree we were told the shoes were olld and worn more than once. Yes it has been worn more than once, it was worn twice. The answer was that they (ADIDAS)will for this reason not repair the shoes. My husband asked that a manager phone him, and untill today we heard nothing. I went to fetch the shoes today at sportsman warehouse, were even their personel said they cant believe it, because you can see on the soles of the shoes that it was not worn much. Point is I paid R900.00 for a girls shoes, and expected for that price it will at least last. Needless to say, I will never buy Adidas again.