Nightmare of migrating from Telkom WiFi to Vumatel fibre

I app**** to Migrate from Telkom WiFi to Vumatel fibre in December 2018of which it was installed the weekend of the 5th of January, and was advised by the technician to call Telkom and activate to fibre once the device activates in 48 hours. In that 48hours the device did activate and I contacted Telkom to activate the fibre on their end. After I had provided the FSAN number they required I was advised that the fibre would activate in 48 to 72 hours. Two weeks went by and nothing happened, I contacted Telkom again to follow up, this was now end of January and was told there is a back log to activate the fibre, I understood and decided to give them a chance to sort out the back log, and that was the last I heard from Telkom. On the 7th of March I contacted them again to follow up on what’s happening as there has been no feedback, I was told the technical department will contact me regarding the activation. They called the next day and advised they have marked my case as urgent. On the 10th of March I received an sms advising that the fibre has been activated. My husband called them on the Monday to connect the device now so we can cancel the WiFi and the technical department failed to assist as they could not activate the device, now we are sitting with a device that doesn’t work, it’s not activated and we are almost at three months with no joy, yet I have received an invoice to pay for the device purchase, what am I supposed to pay for exactly when the device is sitting there and not doing what it’s supposed to do?