When I bought a house, I paid a down payment. The next day, the developer told me that the house was not decompressed and I couldn't sign the contract. What should I do?

This often happens, depending on whether you want a house or not ~ in fact, it is normal for the house not to decompress. Generally, developers will mortgage a part of a house or a building when building a building. When it is built to a certain extent, they can decompress a part of the house, and when it is completely completed, they can decompress it all.