botched booking, now response

Booked a flight through Travelstart to Cape Town. I recieve a mail from them saying the airline has rescheduled/cancelled the flight. I contact the airline to find out what is going on, only to find the flight is still scheduled, but we are not booked on the flight. Only way to contact Travelstart is by mail or WhatsApp, no phone number. Mail sent, still waiting on a response, not the automated garbage they send. Tried WhatsApp, after many computer generated responses I am now still waiting for a 'live agent" to respond< think it may be a while. I think they either didn't place the booking or missplaced our booking and are now trying to cover themselves by saying the airline has resheduled. Not true, flight still scheduled. Still waiting on a response.