Poor customer service and staff attitude at Makro Cape Gate

I bought a Karcher K7 high pressure cleaner at Makro Milnerton. The power nozzle sometimes works 100% fine and then it won't rotate as it should. I live close to Cape Gate and wanted to return it within the 7 days. They first told me I must return it to Milnerton which I refused. I told them there is absolutely nothing wrong with the machine but only the nozzle and if they could please just swop it around they also refused. They insisted that I book it in to be send the the vendor and could take up to a month. So I demanded a new Karcher then as it was within the seven days, they said no it is an accessory and is not covered under the seven days and also that I used the pressure washer as it is not still in it's original packaging. How would you know something is faulty if you don't open and use it? Just poor attitude by Makro Cape Gate's Customer Service Department. As much as I preferred Makro as my favourite shop to by I will not support them with this kind of service and attitude. I could have bought the same machine at Takelot, delivered free to my home and saved on fuel as well.