Manipulation of a customer by younes motor spares

On the 26-04-15 I bought a petrol pump for R500 only to find it was not working or damaged. I returned it back to the shop they tested the pump but never work something which they should have done firstley when I bought the item. When returning the item I was given an attitude as if I fabricating lies, they told me their policy says \No return on electrical items"my argument is that I was sold a damaged item which was only tested when I brought it bac. Their customer service is very bad and no one wanted to attend to my problem"