Vodacom Technical Department - faulty booster, no service from them!

We are very disgusted with the service of the Vodacom Technical Department. On the 21st of July 2018 I logged a call at Vodacom on behalf of my father who lives alone on a farm and needs a booster to strengthen his Vodacom signal. His booster is faulty and I reported it as such to Vodacom. I receive a reference number via SMS, but that is where the trouble starts! No service delivery from Vodacom - the call was handed over to the Technical Department to send out a technician to my father's farm, but up to date (15 August 2018) no such technician pitched! We've called Vodacom Customer Care several times (and chat with them online as well) and each time they promised us that the call will be attended to - but still nothing!!! You will understand my concern if I told you that my father is elderly (in his seventies), have a hearing problem and lives alone on the farm without any method of communication when the Vodacom booster does not work! You know how dangerous it is on a South African farm these days and I'm worried sick about my father. It doesn't even help to visit a Vodacom shop - they only tell us that the call was handed to the Technical Department. Now I want the Technical Department to come to light and service this call otherwise I will need to take the matter further to the Consumer Board! Please Vodacom - respond to this!