Unacceptable customer service 30 minutes in “ drive through “

Went to your carnival mall branch. Had to wait more than 20 minutes in the “drive through “. Eventually when I go to the pay window the gentleman told me , management should employ more people as they are short of staff. Then the customer in front of me had a problem with his order and I had to wait another 10 minutes in the queue. I’ve asked the staff to please ask the customer to move into parking space as I had to still drive to hospital to visit my wife and visiting hours is only 30 minutes. To add onto my frustration there was no cup holders and I was told , sorry we don’t have. So now I had to drive with 3 coldrinks ! How on earth is that possible if I’m alone in my vehicle . Needless to say that as soon as I leave one cup fell over and my whole carpet was covered in cold drink