Car purchase delivery after the agreed date!!

Hello I bought a car with hail damage from private on 26.11.2016 and made a payment of 1000 euro. Since the loan has not yet been paid off and the letter is still with the bank. I agreed with the two ladies that the transfer will take place until 3.12.2016 and then I will pay the remaining amount. Until 3.12.2016 the ladies should clarify this with the bank and get the brif. Today I got the answer: I have not received the letter since the insurance is very much time for the e transfer has left. Ss we are sorry but we have to comfort them to the beginning of next week. Is already a stupid situation because the ladies use the car as well. I don’t want to have to argue with the ladies and the car too. What would you do or suggest?