Extremely poor service for service cancellation

I requested a cancellation of my fibre service 21 Sept 2020, up until now, my service has not been cancelled. I received a quotation with a charge that I do not agree with. I have dealt with several agents starting with Cindy that emailed Kololane to dispute the penalties, then I spoke with Inga and Inga emailed Lebo (not 100% sure of the name, but I know it started with L), then I spoke to a kind gentleman Goolam, who kindly emailed me and assured me that he will provide me with feedback, lastly I spoke with Tia, which also made the same promise, but thus far I have received no call back. I am utterly appalled by this extremely pathetic service. I have been on the phone almost everyday to get answers ad it's costing me quite a bit as my cellphone service provider, is not Vodacom. When I app**** for the service, I signed up for a non contract, free Installation and free devices, however now that I want to cancel, I am being told that I am liable for a modem and ONT Installation. All I want is the charges to be rectified on my quotation and my service to be cancelled, please can someone help!!!