Dissatisfied with the service

I visited McDonald's in Hatfield this morning,ordered a small nazo meal with a medium orange juice ..to my surprise when I had ro go collect my order,the cashier told me they ran out of orange juice,so I asked as to why the machine did not notify me while ordering and he rep**** well also were not aware that it's out of stock, we only found out now as we got in'...now what irritates me the most is that how can you not not know if you ran out of things while dealing with that same product on a daily basis....first they served us chips without spice and now they ran out of orange juice without knowledge????? I'm not happy