Vumatel/Webafrica failing to install fibre as per agreement

I ordered fibre on the 15th of May and Vumatel promised to come install within 5 working days. Almost a month later and still no installation done. I have met all requirements, including a payment of R250. Calling in to enquire/escalate the matter has become rather fruitless as Vumatel keep promising to send technicians through but it has not happened as yet.