Pizza Hut

I order a carry out order to this Location in November 30 at 8:30 I arrived to pick up my order and it turns out doors are locked and people inside looking at me but won't open the door nor answer the phone when I tried calling them. I mean i get it that it could be for safety reasons that they lock the door but answering the phone and let you know or give you information would be nice when I called customer service and asked the lady who answer the phone was rude and hanged up on me. It's sad to see how people operate a large business like Pizza Hut with bad Customer service.