Shocking call centre agent

I have really had enough of VVM call centre agents harrassing me every month. On Friday the 24th July while getting ready for work, I received a call at 7:15 from Moneri. When I enquired about why she is calling she could not tell me, I asked her if I pay my account each month, so there is no need to call me every month and waist my time. When I told her that I am the customer and she must treat me with respect, she then rep**** to me that I am not a customer, I am a debtor and I am in my situation because I didn't pay my account. That attitute is totally unacceptable & I demand that Moneri appologies to me. She does not know my situation & can not judge me!!!! Every time I asked her why she is phoning me, she carried on with this long sentence about pay my account etc. I advised her that I need to get to work so she must tell me why she is calling, she said to confirm and remind me. I pay my account every month, I don't need a reminder. She attitue toward me really was unacceptable & unprofessional. At the end of the call, she confirmed nothing and made me late for me. I demand that something get done about that & I be taken off the system of phoning every month I PAY MY ACCOUNT!!