1. Collect evidence: collect evidence related to the house, including purchase contract, payment voucher, house photos, videos, etc.
2. Contact a lawyer: find a professional real estate lawyer and consult to determine the specific reasons and evidence for suing Changzhi Changsheng Real Estate Company.
3. Submit a complaint: submit the collected evidence to relevant institutions through lawyers. For example, you can call 123 15 to make a complaint, or you can go to Changzhi Housing and Urban-Rural Development Bureau and other institutions to make a complaint.
4. Legal proceedings: If the evidence is sufficient, you can consider solving the dispute through legal channels, and you need the help of a lawyer to conduct legal proceedings through a lawyer's agent.