Non-delivery...Down on a lot of money

I ordered 6 cubic metres of mushroom compost from Pavement Materials Group, being delivered by 6 bakkies as the larger trucks would not have fitted down our driveway. The sales department was very quick with communication turnaround times prior to payment and promised delivery yesterday (2nd October). As soon as they received my payment I’ve heard nothing and no delivery has been forthcoming. My emails have not been responded to and neither the Johannesburg nor the Cape Town numbers are active or being answered. Due to the extra delivery costs using 6 bakkies as opposed to 1 truck I’ve paid a lot extra on delivery...full transaction was R7800.