How can everything I bought stop working in two months

I bought two Pairs of Skull Candy earphones from you in May 2021. By this month, July 2021, both pairs stopped working. One stopped before the other. I exchanged 1 on 6 July 2021 for the same pair.

The customer service lady was so helpful but there is this lady in retail who was terrible and behaved as if I am ruining her life by coming to exchange.

Then the second stopped working shortly after, on 19 July 2021. I exchanged them this morning at Southgate. The service at the tills to process my exchange is horrible (I was "helped" by the same person, Nomalanga. I got her the second time). The customer service women are friendly and helpful. However, there was a girl that I am not sure if she was new or what but she knew nothing about the customer service process. It took her almost an hour to capture my details and my slip so that I can go to the tills to exchange.

When I get there, the person (Nomalanga) assisting me looks as if I am bothering her by asking for assistance.

The skull candy earphones were out of stock. I took a pair of Volkano ones for the same price (well just R10 less). The sound quality is poor compared to Skull candy but they worked fine.

However, that was in the morning. 20 minutes ago I tried using them and one side has just gotten extremely soft, almost inaudible.

I am sick and tired of going to your Southgate branch because of the people at the retail point (not in customer service). The first exchange was also greeted by people who seem to hate their jobs and hate that customers are coming to them.

I think this is ridiculous. How can 3 products bought from you fail to work within 2 months?

And I would like something done about it (not about the people, or person rather, who assisted me, but about the products that you sell that just stop working).