Absolutely dismal service and abuse of monopoly

During this time of constant loadshedding and working from home I needed to buy a UPS device for my Wifi. After making the purchase we found that the Vumatel ONT has an 8 pin power cable that does not fit into any device and neither is there an adaptor for it. After numerous calls to my service provider I was told that I had no option but to request a new ONT from Vumatel which I had to pay full price for. I cannot understand how Vumatel would put customers in this position where we have to pay again for their antiquated device. Faced with no other choice I logged a request with Vumatel. It is now over a month with constant chase ups and not a word from them. They are also the only fibre company in Sandton which means they have the power to hold customers to ransom. This is very bad customer service and I am sure breaches consumer rights.