Need to learn how to treat customers

Went to East rand mall branch today. Cashier didnt have till set up so it wouldn't print invoice. Supervisor arrived and took items to another till to do who knows what as she doesnt say anything After fiddling around with the till i asked why its taking so long. Just got a look and she carried on. I asked a guy if he was the manager, to which he said yes. I asked him what the problem was and i was told the system is slow!! It had nothing to do with the system but was operator error He then walked away. I told him place not up to scratch to which he responded he only just got there and didnt know I told him i will report it to head office to which he got angry and started shouting at me not to threaten and swear at him!!! The manager needs to learn how to deal with customers as he seems to think customers are beneath him. Very rude and arrogant

I complained to dischem head office and was told it would be sorted bur so far nothing has been done