Buying of a Tv

I bought a new TV from Russell's on the 23 September 2019. TV was supposed to be delivered on Friday 27 September. TV was delivered to my residence on the Saturday. Upon closer inspection of TV it was discovered that TV had been cracked on left side. When I phoned the manager she said it's a brand new TV. She said that I will have to wait till the following Thursday or Friday as she can't replace it due to no stock. I asked for a refund and she said she can't refund me. She was very rude over the phone. I took the TV back on Saturday to Russell's. Till now I'm sitting without a TV and my money. I have phoned customer care and they told me to fill in a form. When I asked what form she said she doesn't know. What can I do to either get a TV or my money back