Extremely Bad Service for Such a reputable Company

I called NDS to query about the calls I keep on receiving after I have made a payment on my woolworths account , call agent by the Name Sthembiso Zikalala picked up the call & she was terrible!!! I asked her how she was doing she just pretended like she can't hear me whilst the line was very clear she went on to say why am I calling her if I don't wanna talk? I'm blocking her lines, she even went on to say I must speak or forever hold my peace whilst laughing with her friends on the side, who says that to a client even if the line is bad on her side? She doesn't deserve to work in Customer Service Department her attitude stinks it's not worthy of Woolworths standards. She is pathetic!!! Call was made on the 13th of November 2017 @ 10h01 am ref ********** , I made several calls & I kept in going through to her she continued with her rudeness & dropping my calls. I am disgusted!!!