Telkom LInes down for almost 2 weeks

Our data/Telkom phone lines went dead on 18/02/2015. We reported the fault on 19/02/2015. On monday 23/022015 Telkom have closed the fault. We booked it again ***. We are phoning them every day and holding on for more then a hour every time. This issue is still not resolved. They promise to call back but don't even do that. We are a very busy orthodontic practice and our patients are getting very frustrated with us not being available. We can not continue like this. Please help!!!