Was this rude or wht?

so yesterday after schl i decided to go to burger king i was going to use my american express gift card to pay for my food as i usually do and i was sure it was money still on it so i order my food and the lady had a problem wit it i guess cuz shes new and she called the manger who was an a hole and kept yelling at her my total came up as 6.77 and i had only 5.11 on my card so i took something off so t can be enough but no he gave me my card and reciptand and helped the lady behind me as ahe left i asked him where was my food and he said tht it was overpriced and said denied but i wasnt mad about tht i was mad at the fact tht he just left me standing at the counter and didnt even ask did i want to order anyting else or something and i just got rlly mad and left btw iam 14 as soon as i got home i checked the card and it had 511 on it and i went to mcdonalds and it was fine wht do u think and please no rude answers