My problem is similar. The start of construction is coming up on its anniversary in the next few days. The contract states 8 months. After 8 months and 1 day, we have not shown up at the general contractor's office or threatened with a lawsuit. When it was already widely reported everywhere that heat pumps are hardly available anymore and delivery dates are delayed by many months, my general contractor still had not ordered. We addressed this; it left him completely indifferent and he said he would order soon, and as long as he isn’t directly told that our specific heat pump will arrive late, he isn’t worried. That was in June. Of course. The manufacturers call every single customer and explain in detail when which heat pump will arrive. No. He eventually placed the order sometime in August – by then the 8 months of construction time were already up. Making at least an effort to meet deadlines looks different. Suddenly at the end of September it was said he can’t say at all when we will get the heat pump. Planned for mid-November, but it could just as well come in April 2023. The house can be heated to low temperatures without moving in using a hotboy, or to livable temperatures with moving in, until the heat pump arrives sometime. We have been trying for weeks now to reach him. Phone appointments are simply not kept without notice. Emails are not answered. We have no clue how things will proceed now. At the end of the day, we just want to move into our house. But we have already incurred significant additional costs for months that, in our opinion, could have been avoided. We do want to talk. But nothing comes of it. That is why my understanding is very limited. We will soon seek advice on what options exist to find a solution. Initially amicably, but if necessary, by force.