Support team keep hanging up the phone and now can't get through at all

I called COJ today to get an update on a query regarding a Pre-Termination notice that I was charged for in Dec 2017 and spoke to Linda first, then Treasure to get an answer on another pre-termination notice I was issued in 2016 while I was about it. I got put on hold to 'check the notice' then was hung up on by both of them. Now when I try call, I immediately go through to the hold music and after two attempts now of waiting over 10 mins, the call just gets cut off! This is a disgrace COJ, Herman Mashaba if you want to know what to fix in Joburg, fix the quality of the service we as rate payers get from COJ! I was told if I was to try recover money on a query I would have to go into the office! NICE! So you KNOW people have to take time off work to go to a COJ office and most cannot get time off to do this and therefore never recover their money, dirty trick! I have NOT paid the pre-termination amount for Dec and refuse to do so until such time as they can explain why if I paid my bill I am getting a pre-termination notice charge. Please Herman, sort this mess out and prove why we have put our faith in the DA to get these things fixed after the shambles there was before!