Schools sole is thin and

Hi, I don't really complain and are very easy going person, My wife bought me a pair of shoes at shoe city January the 17th the 3 month is passed a few days ago. I went in to the store this afternoon to enquire what I can do because this is the 2nd pair of shoes that last just over 3 months. I do not have the slip or the box anymore but the shoes quality cannot be that bad that I have to buy new pair every 4-6 months. I do not where the shoes every day tops 2 to 3 days in a 7 day week. But as I went to the store the guy told me I must not where the shoes every day and I must buy 2 pair of shoes.Not everybody can buy shoes for R400 cash, his remarks whats not up to standard. Is it possible that I can have a new pair of shoes?I dont want money