Toyota - no parts available

we have been waiting for 2 weeks for a # ********** 750 Housing assembled / rear diff for a Lancruiser LX 70 2007 while our car is standing at Toyota Lydenburg. We are booked for across boarder fishing trip leaving this coming weekend and have just been told that the part will only get here by the 6th March. Unacceptable! We have booked and paid for our trip and will loose that money if the car is not ready by this weekend.