Rude customer service consultant named Gugu

My husband received a call from a lady called Gugu demanding to speak to me, which my husband politely asked her who she is and what was the call about and again she rudely demanded to speak to Nompumelelo, i took the phone and spoke to her and she then introduced herself and said What the call was about "my contract" I then asked what outstanding amount because that account according to my knowledge was closed about a year ago,than the less Cell C has been debiting money from my account, so if the was a balance outstanding why was it not debited as always? She told me they could not debit for what ever reason I did not get.

I continued to ask what was the R65 outstanding for? Of which she failed to answer me and told me I must stop speaking and listen to her rudely so, from what I know I'm a customer and I am obliged to ask questions where I need clarity.

The conversation was heated and I told her she will give me a call when she's ready to answer my questions, because according to me that's not how you talk to people under no circumstances.She then told me she doesn't care whether I want to listen to her or not it's not her account and she doesn't care, and I will give her a call when I'm ready to pay that out standing amount.

Im soooo frustrated and very disgusted with the treatment I got From Gugu.