must under go customer service training

i went to McDonald Friday night .the line was ridiculously long with 1 operating till. when i got to the till i had placed my order and my debit card had declined , i told the cashier il go to the nearest ATM. within 2 min i had returned to the store i found the line was approaching the door, so i went and informed her that i am back and explained to the customer she was about to serve that i was here just that i had difficulties with my card. she understood , but then the cashier rudely with a bad attitude told me she had cancelled my order i would have to rejoin the queue again<br> like surprisingly it just didn't make sense that i did not cut the line , she served me 2 min ago and we experienced difficulties she tells me to start the line at the back.<br> the customer she was about to serve even told her to assist us because its ridiculous that we have to start the line again, this cashier clearly didn't under go proper training on how to serve customers and doesn't have good communication skills, she did not even apologize for her actions . i wasn't satisfied with the overall treatment at this restaurant.<br>