Bad customer service at Burgerking Savannah Mall Polokwane

Yesterday I went to burger king savannah mall around 17h00 in the afternoon and we ordered through the drive-through and we ordered a family meal for R 250-00. The first experience was while ordering with the lady at the drive-through because we got there with the aim of ordering a two Burgers but before we could conclude the transaction we asked to change our meal to family meal and she was so rude to us and even she called her supervisor to void the transaction she continues to say we are so stupid and we don't what we want but we patient and we kept and continued went to pay with our stupidity. As we went to collection window one guy took my slip and said please park on the side we will bring your order. I did so without any hesitation because I am hungry and hoping it will only take few minutes but we waited for about 30minutes no one came to bring my order and I went inside and the supervisor was called and she asked the staff who said I should wait outside but they even forgot about my order and no one wanted take responsibility and I said just refund my money because even by that time my order was not ready.