Poor service from Vodacom

Hello Peter. I have a fibre installed with Vodacom 2 month ago. On the 2nd March 2020 it stopped working and I reported it to Vodacom. I was told that the technician will come and check because everything looks oketvon thier side. I have been calling Vodacom everyday since then but no one knows how to assist me. I then called to cancel the contract since the Fibre is not working and they are unable to assist me. To date I have not been assisted but they are sending me a bill for Cancellation. Why should I pay for their incopetance and commit to a service that does not work. Hello Peter please help