Worst service support

We are trying since December 2018 to cancel a CFiber connection to house. The previous owners moved out in September 2018 and sent a mail to cancel the order in August, but to this day Cell C has not canceled the connection to my place.

I have logged 2 calls and both of them have been closed with the issue not being resolved. With both calls I received a mail stating that they tried to get hold of me and that I should respond to the mail.

Both times they didn't contact me. Both times I responded to the mail and called the help desk to update the call. and both times the call was closed stating that they could get hold of me.

I responded to the last mail less than an after it had been sent to me with updated details and called 3 times in 2 days after that and was told that they would mark it as urgent.

Still i got no responce, still the called got closed. unbelievable