Poor service from Apple

I went to the Apple store Waterfront Cape Town, to change the battery on my iphone. A technician asked me if anyone has previously worked on the phone. I told them that I had a battery changed about a year ago, by a non Apple dealer. Now they refuse to change the battery.

The reason I went to the quick fix store was, that I was about to go away and needed to have it fixed quickly. Apple needed 5 days to do this. - (5 Days to change a battery????) I couldn't wait that long.

Now I have the time, my battery needs changing again and Apple refuses to do it. That I was told very rudely by the tecnician at the Apple store.

I am a great Apple supporter and use most of their products.

How does their policy add up to good customer service and competitive consumer practice?

Shame on you Apple for your arrogant and entitled approach to customers.