Can't live up to the brand promise

I bought my son 2 pairs of tackies in January and within 2 days the firsr pair was torn,.the other one did the same thing. They had a guarantee of six months but they can't even attempt to finish 3 days without being torn. I am saddened by this because I thought I was making the best decision of buying a well known brand. Within 1 semester I bought 3 pairs of shoes????