Poor and unsatisfactory service to resolve quiries and failing to attend to clients

I app**** for the subscription in early June 2022. The account was approved and technician escalated to install the device and activate. As technician finished the installation of device and run the diagnosis, it was said the internet activation will be active within 24hrs. On the 10 there was no internet coverage, no access to network and the device internet light was off. I was then billed from the 11th June 2022,which I quiried the internet activation pro-rata charge, reason that I had internet access on the 15th June and I had made a fuss even threatened that they cancel the subscription that's when it was activated to access internet. Upon activation of internet I refered to correction to the pro-rata to be rectified and I can pay, still they did not cooperate till to date. I made it clear that I will only pay R260 once off connection fee and month to month R400,until they correct the activation from 15th June to June end but metrofibre does not attend to the quiried but keep on sending me the same bill that is not corrected, which I will not pay otherwise they cancel the subscription, their service is very poor and unsatisfactory to quiries.