Faulty appliance

I bought a three piece stove from your Northgate branch last week Tuesday on Saturday I used an oven and on Sunday which is yesterday I switched it on only to find that the light was of,but the oven is working.today I went to your branch in Northgate to let them know that the light was not switching on, I was told that I need to bring the stove back as it's still within the 14th day warranty.my question is who is supposed to pay for the delivery because it's not my fault and I refuse to pay for a 400 delivery just because I was sold a faulty appliance and also having to pay for it to be taken back to my house.if I am bringing it back using my delivery I would like to request my full refund as this doesn't make sense