Pick n Pay Malver Durban sells mouldy pizza

Purchased pizzas from pnp malvern on Sunday night. Went straight into the freezer. Took out on Monday night. After removing packaging found a whole lot of mould on both. Took it straight back to pnp malvern. Spoke to pic named veejay. Told him and all he said to his staff was to do a refund. So I told him thats not good enough. He asked me what I wanted and I said an explanation. Then he checks the expiry date and says the sell by date was Sunday and I should have checked the date. I told him that if it was expiring on Sunday they should have put a sign that said use within today becos not everyone checks the date. He continued to argue with me and not once did he ever apologize. This malvern pnp is by far one of the worst. They are always out of stock e.g. for the past 4 months they have not had Frisco green label coffee. When you speak to management their explanation is that the supplier has no stock and yet across the road from them checkers which is much smaller has the stock.