No Service or assistance

My father passed away in 2020, i've been contacted by Multichoice agents 4-5 time a week regarding an outstanding amount on my fathers account, where i have explained to the agents that they need to email me proof of this outstanding amount, seeing that he cancelled his DSTV in 2019 already. Was just punt on hold by an agent for 21 minutes. Why do you refuse to email me proof of this apparent R219 that my father has outstanding with MultiChoice, o and have i mentioned that they all of a sudden started harassing me on my office phone? Do you people actually make notes on your system or do you just like to irritate people?