Tickets were cancelled without any notification

We've booked tickets months ago with Kulula. The site let us check-in. We got to the the Cape Town International Airport today, and were told that Kulula doesn't exist anymore. We never received any notification to inform us of this, and we had no idea. No one at the airport could help us with our now non-existing flight, that cost us thousands of rands. There is no way to contact Kulula for refunds, or to at least arrange a new flight for us through another airline. I cannot express just how livid and utterly sad we are. We were supposed to go from Cape Town to Johannesburg today for my cousin's wedding, and now nothing. I have not seen my family in 10 years and we don't have the money to spend on more tickets, not that any tickets are left now anyway. I don't even know what to do now with this complaint, because there's no one to fix it.