Vox - The worst service provider in SA

I requested fiber from VOX in March 2022. I signed the contract in March. By August the system was still not installed. As of January 2023, I still don't have the fiber installed and VOX is now sending me bills for over R12000, saying that my business partner cancelled the contract in september. However, as he didn't sign the contract, he has no power to cancel it. Now, I have interest being charged on this over due account. The account manager Donovan won't return my emails or phone calls. Please explain to me how I can be charged for fiber that was never installed, and never legally canceled?? This is the worst company service provider I have ever dealt with. Disgusting service all round! I will go out of my way to tell people about this terrible company and their employees. My next step will be social media and the CPA ombudsman.