They sold me cold and old pizza, and they told me I can go warm it at home

I ordered my pizza through the phone @ 7:26 pm and they told me they'd call me I'm a few minutes for my order number. At 7:43 I still didn't get my order so I called them again and I got it. When I arrived 8: 10to pick it up it was cold and looked old. I told the cashier, she consulted with her manager and he had the audacity to tell me I must go warm it at home. The Avo on top of the pizza had dark patches and they told me its because it was hot.im so disappointed I'll never buy pizza from them again.