Over charged and account arrors

Kindly advise me here,am currently using metrofibre service for more than 3 years and 2024 around April i started to experience network connection issues of which i reported several times,kept on telling technician run all the test nothing wrong with connection

I kept on login calls asking them to come and test their device was told i need to pay a technician of which i refused because is Metrofibre duty to maintance their devices and i find it strange that Metrofibre expect their device to last life time, imagine and i pay for the service everymonth .

Finally technician was sent to my house of which he noted that their router is no longer functioning of which it was replaced with another USED device.

Month end i have received a huge bill without any communication what so ever of which o didnt pay and i questioned the finance later they reverted back with a correct invoice of which i paid it. And i pay for my service via EFT and forward POP but my statement showing different amount of which i dont now how.After they came to replace thier own Device Metrofibre billed R800 my account for changing their own device and without my approval.

I have been trying to communicate with finance but seems as incompetency have taken its place ,consultant hungs calls ,they dont honour their promised to call me back,i spent money to call them ti fix my account do date nothing has been fix ...am not happy at all,i left WEBAFRICA for this kind of **** service.