Terrible service and empty promises

We moved into a new place and waited about three months for Vumatel to come and do the fiber installation. Soon after installation the line just went down, they then fixed it and now it has just gone down again. We have been phoning and logging requests for a technician to come and resolve the issue for 2 weeks now, with no success. We have also lodged complaints and no one is resolving the problem. They give lots of empty promises about when the technician will come. We then sit around and wait for them and they just don't show up (this has now happened twice). We are extremely fed up, as we are paying for a service that we are not receiving and data is not cheap. Trying to get this issue resolved between Vumatel and Vodacom is such a headache, as they just pull up their shoulders or just don't give feedback. From other reviews it seems that this is a common problem, so Vumatel should really seriously look into this.