Extremely poor customer service

So I ordered some stuff online and got it today they send the incorrect size I went to the Tygervalley sportscene branch I asked the sales consultant if it's possible to do an exchange cause online sent the incorrect size and he told me yes I can then I saw a black colour in what I'm going to return I asked the sales consultant if I can get the black one instead and he said his gonna find out and he came back and said yes then when I got to the till point I was given problems the looks the girls gave me wasnt professional attitude was given and I was told I can't do an exchange thats the policy and then when asked to show it they couldn't it was put back onto my account and now have to wait for 24hr to purchase the damn thing again and at full not discount but note I wanted to do an exchange not refund the level of customer given was extremely poor sportscene needs to send their sales consultants for training on how to talk to customers!!!