Dominos Pizza

I placed a lunch order online, through the Dominos website for carryout at this location. I prepaid the order online to avoid a delay at the store. I arrived at the store just a few minutes after I received notification that my order was done. I opened the door to walk inside and employee behind the counter immediately began screaming at me to "GET OUT". I went outside and the employee abruptly was face to face screaming at me "Can't you read those signs?" "We are trying to keep people out of the store" I asked him why he was screaming at me, and why do you treat customers this way. He became even more upset and said "you aren't getting anything", and started back into the store. I told him that I had prepaid and he again said "your not getting anything, I'll cancel it" What is going on with this business and why do they employ team members that treat cash customers so terribly?