Satisfied with car.... Unsatisfied with dealer

We have Booked Kia GTX diesel variant black colour on October 11, the dealer assured us that he will deliver the car before Diwali... And after that, they keep on extending the waiting period... Now it's December till now the dealer didn't deliver the car... Just they're saying that we have demand for black colour and as yours is the top end we can't deliver to the expected date... These are the words given by the dealer... Apart from this, the car is just amazing.