Go Walk2

I purchased a pair of Go Walk2 in Novemebr 2014 from Kingsmead Shoes in Game City , Durban , South Africa.<br> In late February 2015 I noticed that the inner soles was wearing very fast and that the orange in certain areas of the sole was eroding and the black of the undersole was now becoming visible. I took the shoe back to the store and they advised that they will get the rep to have a look and advise further, Lat week I fetched the same pair of shoes with a letter from BELLA MIA SHOES (PTY)LTD , stating that they have assessed the shoe and the shoes bears no manufacturing defect. Fare wear and tare.<br> <br> How can a pair of shoes get damaged at the innersole whilst the outer sole is still intact.<br> <br> Please assist