The Manager on duty could not run a tap !

Yesterday the 4th Jan 2018, I went to collect medication. I am currently on crutches after having a partial knee replacement, so cannot really stand for too long a period. I had finished doing my shopping and the que for the cashiers was very very long. When I got to the checkout I figured it out, there were only 4 cashiers working. When I got to the till I asked the cashier to speak to the manager. Now if that was me, I would call the supervisor over to ask her to get the manager, and I would carry on tilling up the goods. But no, the cashier decides to go and look, leaving me standing at the till for another 5 mins !! An assistant manager, Steve, came to talk to me, I asked why the que was wrapped round the shop and there were only 4 cashiers working, he mumbled something then left. No apology from him, why aren't the supervisors watching/looking at the ques and doing something about them? I then waited for my friend, who was another 5 mins, and there was no sign of any more cashiers being brought to the tills !! I was told by my cashier it was because they were all on tea break! Really? Is the customer not king? This is a disgrace for your customer service Dischem.