Poor service for repair to business landline

We operate a busy restaurant and our landline at this time of year is especially important for bookings, preparations for the busy season. We reported a fault to the landline on the 14/11/2017 and as at today the 29/11/2017 we are no closer to getting it resolved. It has apparently been sitting with technicians from the 11 Nov 2017. We have had 0 telephonic bookings as customers are unable to get hold of us. we have attempted to divert the number but nobody and Telkom Toti can facilitate us to do this despite us being to the Telkom shop on numerous occasions and the " service staff " trying to do this . I have tried to contact Managers etc, they are always in meetings or never there .Can someone help me to get this matter resolved. Our business is suffering as a result of these inefficiencies .The Fault no is 482CNK141117 and ref is ********** .