Poor quality and service

I purchased 2 pairs of Zoom Structure 17 The first pair lasted 4 months and the rubber started peeling on the heels. The second pair has not even lasted 1 month and the rubber on the heels is peeling off. The first pair I returned to the Retailer and got my money back. However, the shoes keep going up in price and if I return these I have to pay in R600 plus on what I paid for the others. Nike promised to come back to me. No response. <br> In the meantime I am trying to run in old worn out shoes. After 26 years of loyalty to the brand, it is time to change the quality is obviously inferior today