Poor Service, Long Wait and Unsealed Beverage at Drive-Through

I had a frustrating experience at the drive-through due to an unclear speaker system and poor communication from staff. At the payment window, multiple staff members struggled with the machine while talking among themselves without explaining the delay or apologising. I waited over 20 minutes despite being the first customer. The coffee was very bitter with little milk, and the hash brown tasted like it was fried in old oil. I had purchased the meal for my son as a school treat, otherwise I would have cancelled the order. This is not the first time I have experienced poor service at this branch, and I hope management addresses these issues.