Excessive billing for fibre which is NOT even installed yet.

Signed up for black friday special for fibre. They said installation should be done within 2 weeks. I gave the 30 days notices to change mobile data contract to change to prepaid mobile (the 2 yrs contract for the mobile data had finished), I asked them to keep the sim active (on prepaid), incase they took longer to install the fibre. The person at the telkom store made a note 5 times to NOT cancel the sim. Well 1 month later. Well 1 month later no fibre installation, and the sim was cancelled, I went in to get a new SIM, while I wait for fibre installation, and their system was down, they could not activate the new sim. The person says all is in order for the fibre. I have been back twice more and their systems is down. Almost 2 months later, still NO fibre installation, but I am starting to get bills for R1100!!??!? The special is about R699 a month. You are also supposed to get the first 3 months free, which should start from installation. Three times I have gone in to the telkom store figure out what is going on, and their system is down. They say they will phone me back, but never do. What a waste of my time. I have heard stories about the horrors of telkom billing but the price was so good it was hard to resist. No matter how good the price is, its not worth it dealing with this company.