This is a follow-up to this question.
I went to see a house and I said I wanted to rent it. The real estate agency sent me an email asking if I would accept the rental proposal (just the rent values and contract costs). I said yes, that I agreed with the price conditions, so they could draft a contract to propose me.
Today (less than week after), they sent me the contract and also the details to make the money transfer, but I decided not to rent the house after all.
I didn't sign or accept the contract but now they sent me an email saying that the Dutch law says that I have to stay with this house, because we had a verbal agreement.
I know that I'm not being entirely correct with them, but I believe that I am not obligated to accept and sign the contract, so I think that they are trying to force me illegally. Is this bluff from them or is it really a thing?