No DSL for almost a week

Our DSL internet just went dead Monday this week. I have reported it to the 10217 call centre many times and initially I was told there was an area problem. After phoning the next day I was told nothing is wrong by one agent. I took our router to the telkom shop and it tested fine with internet working. Each time I follow up we are being told a technician has not been dispatched yet. I plead with you to fix this because we can NOT work without internet. We are losing business.