Worst customer service

Went in to the Exact store in Hillbrow today 27/02 around 10.30am and received the most appaling attitude from Thapelo one of the cashiers. I went in there to request a refund and he rudely informs me to come back later as the store has just opened and they have no cash. I then enquired why I should be inconvenienced as a customer yet when they accept tender for a purchase they have no problem with what time of day it is why is time a factor when they have to process a refund and his response was that this is not his problem. I requested to speak to the manager and he rudely informed me that they are not in today I can come the next day if I wish to speak to them. I asked for his name and he refused to give it and proceeded to ring a purchase for another customer while completely ignoring us. I told him we need your name to file a complaint and he said he won't give it so I then purchased a carry bag so as to get his name from the till slip. He told us we can file a complaint if we wish nothing will happen to him while dancing to some music playing in the store.