I am still deeply confused. Could you provide a timeline on what happened when in terms of this studio – forget all the extraneous tuff about what other people did aor said.
When and where was it constructed? Was permission sought, given or refused, and if given, under what terms? What has triggered this dispute now? And what is the claim being made and by whom?
Keep it simple and we are more likely to be able to advice. Bullet points would be best.