Withdrawing From A Sale

There have been several delays in buying our Leaseback in Theoule Sur Mer. This has included that we still have not received the signed copies of the contract back. The developer says they were sent but it was when we were away. They have never arrived. As time has gone on with delays I have considered pulling out of the sale. Can anyone confirm as I have never received the contracts can I pull out under the 7 day cooling off period as it effectively never began.