I’m happy to see you are both on the right track girls with an unbiassed legal advice from your new recommended lawyers. 😉
Remember a requerimiento notarial is only an official communication, that’s all. The Notary isn’t ordering them anything, he only gives unrebuttabla prove of said communication having being performed for a future court case for example.
Your lawyer must send a RN notifying the Developer that the contract is deemed null and void due to the seller’s breach of contract (failure to obtain the Building Licence).
After this is done expect a timeline of approx six months with your lawyer chasing them up after your funds plus 6% delay interest as of art 3 Law 57/68.