Mr D, no responsability for their terrible service

I placed an order, whilst tracking my order, the driver took 30 minutes to from the moment he collected it to my place. The store is 5minute drive from my home. I called in twice to the Mr D customer service and got no joy. My order came and the pizzas were ice cold, the chips were hard. The driver did not even have my order in a warming bag, had it loose in the plastic bike delivery box. When I made a complaint, Mr D says that I should have rejected the order. They are refusing to refund me, but instead want to offer me a R30 coupon. What *******.