Vox Telecom failing to deliver

I stay in an apartment block in Cape Town that has Octotel lines installed. I was instructed to contact Vox for a router and to sort out the activation of the line by the team who installed the line. I have sent three emails to different Vox email addresses in the last two weeks and am still waiting for a response.

I am a designer and need the internet connection to work and earn a living. I have spent obscene amounts of money on mobile data in order to hotspot and this is just not on. I am tired of waiting for Vox to reply and my patience is wearing thin. Please sort this out because it is not fair to provide customers with half a service.