Rude and impolite Treatment from a VodacomSA

I would like to complain about the rough treatment that I received from the Vodacom Subscriptions Collections Department. A lady who served me dropped a phone on me while I was talking to her. I called telephone service provider, VodacomSA querying my account at about 13:22 this afternoon. The lady was arguing that my phone is in arrears of R1194.84 and I disputed this, pointing out that I made a late payment last month. She added that I had made a short-payment of R85.99 on the previous month. When I tried to explain that perhaps there could have been a misunderstanding, she just dropped the phone. I must explain that I retired from 01 January 2020. Since January 2020, I have not been able to pay Vodacom contract on time. However, I have been able to make payments well before the following months. But I must stress that I have not skipped a month’s instalment payment.