If the bank balance has been transferred to the seller's account, but the seller does not cooperate with the settlement costs to hand over the house, you can work with the intermediary to communicate with the seller about the handover time. But in a situation like the one you mentioned, you can enforce the terms of the contract if communication fails. Because the terms in the house transfer contract you signed are not perfect, you are at a disadvantage. I suggest you use another agency when your relatives and friends buy houses in the future. A company that doesn’t even have a perfect contract is not trustworthy!