Jean Burger King staff is unprofessional, disrespectful and dont value customers, if you want to see bad service pay them a visit

Burger king jean avenue is the worst when it comes to customer service, i arrived there on the 30th October at 07:00 in the morning on the drive thru, the mic was not connected i drove to the window and was told to reverse back to the screen to check what i want to order, did that chose and drove back to the window to place my order then paid after that i waited for over 30 minutes while no one is saying anything, i went in the shop to enquire but was told they are busy with my order but i asked why no one is saying anything about the delay since they promised all orders are processed within 10-15 minutes. I am writing this review because i reported this to David the branch manager who promised to deal with my complain but it seems He is on the same page with his employees who are unprofessional and dont care or value their customers, he promised to deal with the situation and revert to me but since we spoke he never came back to me about the outcome. Worst part that day i was taking someone to an interview and we got there late due to this Burger King