Bad and very poor customer service( Ackerman wonder park mall)

A very bad custom. Er service were I had to spend all my lunch time queueing, and when I told the cashier that their service is bad, one of the staff member who I learned that his name is Nelson told me that he bought a phone in 2019 at Incredible connection ( were I work) and had to wait for long. Instead of acknowledging their bad service he tells me that nonsense. They didn't even apologize. It's not the first time, Ackermans has bad service, they have so many tills with few people to assist customers. Or at least try to explain why they are slow. I am so disappointed by Nelson to address me when I was not even talking to him.