Terrible ongoing service issues with RSAweb !

I signed up for a 500 MBPS service on 17 August 2022, tested the line for several days and never got above 11 MBPS. I spent weeks playing their technician using hours of my own time , and when it was never fixed I told them to downgrade the line, credit me and cancel the service. Furthermore come collect their unused router as I have my own Mesh network. After another follow up today they are FINALLY cancelling it by 31 Oct, and despite not delivering the ADVERTISED speed which I raised within 7 days, they still invoice me R2500 for cancellation for a service they have not delivered ! I will be referring them to the Advertising Authority and reversing all debit orders !