New user- NO CONNECTION FOR OVER A WEEK

I have recently taken out an LTE package with VOX and been struggling to connect for OVER A WEEK. I was first delivered a faulty device and decided to collect a new device from their head office myself, in the interest of time. I have since tried to connect my wifi and phoned them at least three times a day and no one knows what's going on or how to resolve the problem. I was told that it was escalated to MTN two days ago, but it has still not been resolved. I am now paying for an LTE package that's not worked for a week and buying mobile data, in order to use my phone as a hotspot. This is becoming an extremely costly and annoying affair. VOX- FIX THIS, OR I AM CANCELING!!!