I am the driver of a new staff member at ocean basket who's phone is currently inactive

I am the driver of a new staff member at ocean basket who's phone is currently inactive. When calling to find out what time his shift ends as it changed daily while he was on training. I was shouted and screamed at by an African lady when calling ocean basket Pinelands, saying that she did not employ me, If the staff member wants his shifts he should ask her. After explaining that the website states, their latest shift is at 9pm and I have a schedule to work on as its Saturday, she proceeds to shout that it's not my business and puts the phone down in my ear. If this is the negativity towards a staff members driver, I can't even begin to imagine how intolerable that toxic working environment is. The manager taking her stress out on someone calling into the branch is no way to treat a human being. I WOULD NOT RECOMMEND OCEAN BASKET PINELANDS. If the attitude is negative, the food is negative too. NO THANK YOU!