Every week when I do a big shop at Coles they only...

Every week when I do a big shop at Coles they only have one assisted cash register open and a long queue forms. It is difficult and there is insufficient space to go through the self checkout area when you have a trolley full of goods. Why do I have to ask every week if they can open another checkout? Why cannot staff monitor checkouts and re-allocate staff during busy times? This is not rocket science and would provide far better customer service. In my experience Woollies customer service is streets ahead of Coles.