Repair imposed on customers

I returned the Russell Hobbs illuminating kettle to Boardmans in Greenstone Hill because the lid did not close properly. The kettle was still under a 1 year Russell Hobbs warranty and I provided the teller with the receipt. Mazwi, told us the kettle has to be taken for repairs as we bought it more than 6 months ago. I told him that I prefer a replacement as I am entitled to either a refund, repair or replacement. He insisted on the repair which means the repair was imposed on me. I had to go to another store to buy a new kettle while waiting for the Russell Hobbs kettle to be repaired. I went to fetch the kettle today( a week later) and the lid closes but not like it did before the lid broke. I told the teller, Tinyiko, that I am not happy with the repair and she told me that she does not see a problem with it as it closes, to which I responded she is not the one who has to be happy with the repair as I am the customer and have to use the kettle. The two employees at Boardmans Greenstone ( Mazwi and Tinyiko) show lack of respect for the consumer act and the customer service was very poor.