Goods Damaged and Bad Customer Service

I have a big issue. I bought a defy 3 piece stove (hob, oven and cooker hood) and washing machine at Dion wired menlyn last month,Friday the electrician came to install it only 2 find it cracked into 2 pieces. When the appliances got delivered my mom received them and when she asked to see the hob the delivery guy told her they opened up a whole on top of the box to check if it was ceramic so my mom should check on that whole because they are tired they are going to Olieven and mind you they delivered around 6PM. The same day I went to the store to return the hob and I was told to wait until Monday. I called the store to ask for the stove measurements and I spoke to Blessing she said she is the manager she was extremely rude and told me i will not get a replacement or a refund. I did not open all the items because I trust the quality of your store but unfortunately that is not the case with the hob. I need a new hob or a refund as it was never used. I called the manager again today and he said he is trying his best but to get me a new stove but he doubts it will happen. So what im supposed to do with a new cracked stove now? Dion wired is a big store I am sure they are aware of the consumer protection act" Please see below which is from the

Consumer Protection Act d) right to return goods and seek redress for unsatisfactory services

Right to return goods that could not be examined prior to delivery.

Consumers may return defective or unsafe goods and request a full refund, provided it is done within a reasonable period.