Poor Customer Service

I purchased a breast pump from Baby Boom in June 2018. It had a 1 year warranty. I only started using it January 2019 when my maternity leave expired. Early in March 2019 the pump started giving problems; not extracting properly. On 30 March 2019, I went back to the store, Babyboom factory Shop Kempton Park, to exchange the pump or get a refund. Ethraim done a pressure test, and fiddled on the pump using dirty tools from his toolbox; he concluded saying the pump was fine. I insisted that I use the pump so they could see that it was not working properly. Buhle accompanied me to their kitchen, where I used the pump, and she saw that it was not extracting properly. I attempted expressing milk for 30 minutes, in Buhle’s presence, with no success. I requested a refund or an exchange and they refused; even after seeing that the pump was not working properly. Instead, both Ethraim and Buhle insisted that I buy a new pump. So much for customer service. Why give the warranty but when customers want to use it, then Baby Boom refuses to exchange faulty products.