Phone gets slamed in my ear

I ordered a pizza online at 15:22. An hour later I called to find out where the order is and I was told that my order is out on delivery with a driver and it will be there within 5 min. 15 minutes later still nothing and I called again. I spoke to a girl by the name of shamiela( I think that is her name as the line was a bit fuzzy) who told me that the order is still at the shop and they waiting on drivers to arrive in order to deliver it. Upon finding this out I proceeded to tell her that I am not happy with this and that I would rather cancel the order. This is when she said nothing and slammed the phone in my ear. This is highly unprofessional as I purchase regularly from the franchise and would expect a better response in the way they handle their clients. I would appreciate if I could get someone to contact me regarding this matter as soon as possible,