Vodacom Fibre inconsistent connectivity

Towards end June I asked my daufhter to sign up with vodacom to have a fibre connection installed whisch she did & technician came out but i hace never had a consistent connection ever since installation... I have called vodacom numerous times to report that the internet connection would come on around 9am and go off again around anytime from 16:30 to 18pm and hace no internet connection throughout the entire night until the next morning again at 11am when it would come on again... now this has been going on since june the 3rd technician whowas assigned came the friday afternoon, so INTERNET was interupted during That period , it worked friday , Sat & sunday two weeks ago it went off at 14:30 and have had no connection since than. I than decided that due to the lack of service n no connectivity I would rather cancel during the 3month free trial which I did because I have had inconsistent connectivity from day one. We than received a cancellation quotation from Vodacom and all this while I'm still not connected to fibre of fifteen thousand!!!! After I specifically said I wanted to cancel without any penalties due to No Connection . Had the connection been consistent there would be no need for cancellation. On Sunday I called and was told that it has been cancelled but yesterday received this shocking high cancellation quotation amount. Please help Una