Dismal Service

I have had the worst experience ever trying to get a Vumatel fibre installation. Vumatel installed a modem without the all important sticker with some number and it has taken 3 months and a change of isp to try and get Vumatel to resolve this issue. I changed isp's, thinking the issue was with the isp - only to realise Vumatel are the problem. My Installation request has been going on since October 2017. I have been following up weekly and every single person apologises and escalates, then nothing happens. I was put through to their scheduling team who promised to have a technician attend to my problem on 19/01/2018. When noone arrived, I followed up only to get another apology and yet another escalation. I have not heard anything from Vumatel to date and I am guessing I will not hear from them until I make my weekly follow up call and get yet another apology, another escalation, another unfulfilled promise. The worst thing is they are the fibre infrastructure provider in my area and I am kind of stuck with them for now. All I need is for them to resolve my query of more than 3 months.