Loyal customer lost

Goodmorning,<br> <br> I went to the center on Sunday and requested from the cashier to swap the shoes I had purchased on account the previous day, for a different size.He then looked on his computer and told me that it was out of stock. When we walked into to the shop I went to go stand in line while my wife went to go look for the different size. So after the cashier Senoko said that it was out of stock my wife came with the same shoe I was looking for and it was the size I needed.He never apologised for his mistake he just pointed to the computer blaming the system I suppose.I handed my slips to him to process the request and he then told me that I could get the discount on the shoe I got when buying it on account with a R150 voucher the previous day. I received these vouchers when opening my Markham account and for me to get no explanation as to why I could not get the discount left me baffled.I then asked him to reverse everything and return the charges they had made to me back to the credit I had received.I am dissapointed in Markham not their employees. They make the policies and conduct the interviews.