Poor Service from their Representatives

I have had connectivity problems since around 10 march 2020. I have reported the problem in April during the lockdown and I was given an invalid case number. When I followed up later than month I was told the case number is not valid. When I finally go the case number on 6 May 2020, they did their diagnostics with me and found that the connectivity is very bad. The case has been resolved but one of their technical department made a huge mess when cancelling my contract. He cancelled one contract correctly and the other one that I did not ask for it to be cancelled and he has not responded or fixed this mess he created. They are now charging me for the router device that they did not collect after cancelling the contract. I logged another case to dispute the charges I incurred during the moths I have been paying while I was not getting the service and they resolved it also without clear and proper explanation . Every time I call Telkom, my calls get cut off during the call and I have to explain my problem to a different person each time and this is very frustrating and annoying. TELKOM and its call center assistants are useless