Poor service

I left my car with them on Tuesday morning,never received a feedback from them with regards the problem with the car.I sent them whatsap messages as they use whatsap to communicate.They blue ticked me.On Wednesday morning I sent them a message a again asking them when can I expect the car to be fixed.The answer I get is they don't know.I must just sit wait.They are waiting for someone to come work on it.I don't even know where this person is coming from.When will this person arrive at their workshop.