Bad service at Pep cell

On the 29/03/2019 I went to Pep cell in King Williams Town @Metlife Mall to buy a cable charger it was around 16.30 to 16.45 . There was 4 clients in front of me a old pensioner who came to report a phone that was not working. He did not receive assistance they did not even tried to help him. When I got home I inserted the cable in my DVD it immediately went blank.I went to Pep Cell to report that the cable is not working where I bought it they could not assist me because I misplaced the slip. My question was I know the time and it's not like it's days apart they refused to assist. What made me angry the guy who assisted me yesterday remembers the transaction came through the door and yelled that I must bring the slip.I went to another Pep Cell to ask for the number of contact centre.There was a guy I did not get the name as he was not wearing name tag. He asked what happened I told him he said I was irresponsible to loose the slip I rep**** saying the only thing I need is assistance as this happened yesterday . He asked the clients in the line about the service that they receive from my work as I was wearing work uniform which was unnecessary as it has nothing to do with the situation. I became a laughing stock of the day. I told him that I will report him he said I won't know his name I guess he is being rude to clients on purpose. I received bad service from both Pep Cell in king Williams Town. I'm even worried about that Pensioner because now I think they are selling damaged goods for a purpose.