You don’t see it. I think "Julia - the liar" already feels addressed. What is so unrealistic about only noticing the whole thing after 15 years? I think it is also possible to respond in a "normal" tone here, even if topics repeat and repeat. I don’t see a problem there. But back to the topic.
Julia, there are only humans working at the building authority too. I wouldn’t do it over the phone but just go there and discuss the whole thing. There are plenty of solutions. For example, we had 4 deviations from the development plan. Among other things, the ridge height of the house was exceeded. I was also unsure whether that could stay that way, so I sought the conversation with the building authority. After 30 minutes, the issue was settled and the new height was included in the building permission with an exemption permit.