Moisture damage to wooden beams

Good day! I bought a house 1 month ago! During the renovation work, I noticed that there is moisture damage in the ceiling. The moisture comes from a leaking shower located on the 1st floor. Under the shower, the entire wooden floor was rotten. One beam is partially rotten and the screed above it is porous. Additionally, the central heating is not working and cannot be started, the water pipe is leaking, and the heating pipes are also leaking in 2 places. I am a private person. I bought it from a private person. The purchase price has already been paid. The land registry entry has not yet taken place. The purchase contract states "bought as seen." I have no information from the seller about any damages! Can I claim damages or withdraw from the purchase contract? Do you have any tips?

Take an expert with you to the next house viewing, it costs less than you think. ;) The answer to your question is already included in your post.

Well! I already see myself at the lawyer! Fortunately, I have legal protection for this case.:mad: I'm curious to see how it will continue