Poor Service - I am still waiting for my washing machine to be exchanged

Had a bad customer experience at Game Jabulani Mall.

I arrived at the store to buy a washing machine. I had to wait for almost 45 mins to get assistance from one of the staff members. I was later told that the washing machine I wanted to purchase was out of stock and I should resort to taking the one they had on display which I refused to take. 30 mins later, the store/ department manager was able to find the washing machine which they had initially stated that it was not on their system.

I then continued with the purchase and the washing machine was delivered on the same day. It was when I tried to use the washing machine for the first time that I realized that the washing machine has a leak. I made them aware about this problem and they later sent a technician to check the machine. It was later discovered that the washing machine was not assembled properly, which was the primary reason for the leak. It was at this point that I made the store aware that I want an exchange since the washing machine had a fault and I reported within the 5 days of purchasing the machine which falls within the 7 days of the store policy.

They said they are going to send another technician and I am still waiting, so that they can communicate with the supplier - Hisense, about the exchange. The purchase was made on the 8th of September, and to-date I am still waiting for a refund or exchange.

I am extremely dissatisfied, how can a new washing machine undergo repairs within 7 days?