Pathetic Service experience

I bought a demo car on 08 January 2019 at 11k took it in for 15K service. At the time it had the heartbeat warning sign I explained to service advisor then no further explanation was given. I use the car for work purposes so an travelling a lot, over the weekend was driving with my daughter when fumes (burning wires) came out of the car bonnet. car was towed to Roodepoort branch and they claimed they have 22 hour quing system . It's Wednesday afternoon. No one has called. The Centurion branch I bought the car from and did the 15K service is telling me they are waiting for the diagnosis.