Was rude when taking order, **** about identity

Saturday evening I called in to Nando's to order. A lady answered abruptly asking for my order following a mentioning of her name (Sandy). When placing my order she was silent to the point where I had to keep checking if she was still on the line. She did not acknowledge or prompt me forward and sounded snappy and rude. I had finally lost my calm when she raised her voice at me after me asking if she was still on the line, she rep**** with a loud 'Come on sir, I'm holding on the line for the rest of your order'. When I asked who I was speaking to, to confirm, her name suddenly changed to 'Amanda'. So I had drove to Nando's to place my order there and wait. Upon receiving my food I had queried with the staff if there was an 'Amanda' working at the restaurant, they had informed me that Amanda's shift had ended at 16:30, (I had called in at 19:55) and the only other indian female staff was Sandy, the Manager. I did not bother to speak to the rude and dishonest manager Sandy, I knew it was her from hearing her voice whilst she was talking to other staff members. I strongly suggest she receives training in speaking skills and phone etiquette if she's going to be taking calls.